I have read (and read) what you have written, and this is what I'm seeing you saying:
1. That there was a worldwide flood;
2. That there is evidence for a worldwide flood;
3. That there is scientific evidence for a worldwide flood;
4. That the evidence contradicting a worldwide flood doesn't change your belief because science doesn't know anything (er ... everything);
5. That physical laws don't apply because God.
If this is what you are saying, then my comments apply.
If this is not what you are saying, then I am utterly confused about what you are saying.
1. No. I, personally, have no experience or evidence of a worldwide flood. I did not see it or get wet by it -and I have not been digging around to check out the claim.
4. No. However.... The pervasiveness of the great flood theme in many cultures is some sort of evidence of
something -whether that something is an actual flood at some time or the tendency of humans to write a story about disaster -or a some mix of those and other things.
3. No. Some "scientists" say there is no evidence of "A" worldwide flood (as in just the whole earth being flooded at the same time) -some say there is -both likely have
some personal bias, even if they do not let it affect what they believe is likely to have or not have happened -which is itself based on incomplete evidence, regardless of who is correct or not.
4. I only have belief in the possibility of a worldwide flood. It is not extremely important to me -even though I have faith (more than blind belief) in the God of the bible.
"Science" ought not accept any
conclusion until there is
complete evidence -otherwise it ought to say that the available evidence does not suggest this or that. However.... Certain aspects of a worldwide flood can be said to be true or false as long as certain other things are true or false.
5. Yes and no. PRESENT "
physical" laws have not always applied -though the most basic law upon which they are based has "always" applied. For example, the laws governing interaction of the elements did not exist before the elements -but the
most basic laws which allowed the elements to be formed would have "always" been in effect.
The God described in the bible existed prior to the formation of the elements, and is responsible for their formation.
He is therefore not subject to present physical law -but the most basic law is essentially his own nature -as he is essentially "everything" aware of itself.
Our present limitations are actually due to the fact that we ARE subject to present physical law -because we are composed of the elements, and interact with external things which are composed of the elements. God would not be limited in this way -but even we are becoming less limited -less subject -by increasing our knowledge and changing how we interface (with external tools, etc.). It could even be said that humans have accidentally caused worldwide
flooding -if SOME scientists are correct about global warming -whereas once we were not able.
So -there is both what is possible and of what a being is capable to consider -and the capability of a being is based on its nature.
Life forms on earth vary in capability -but are limited by their nature. SUPERnatural things are impossible
to them alone -but that is not to say supernatural things are impossible.
A being "composed" of that which has always existed and preceded the formation of the universe would interface on that level -which is, by definition, SUPERnatural
from our perspective.
More correctly, that being would be of a pre-universe nature -which is possible because there was some sort of stuff and some sort of law.
Such a being -capable of forming the elements by applying logic and forces on that level -would also be capable of manipulating, suspending or altering the "physical" laws of the universe.
"Science" cannot simply accept the existence of God or the capability of manipulating, suspending or altering the physical laws of the universe. It, overall, has no evidence of such. It must consider only the possibility of A worldwide flood based on that for which it does have evidence -which is physical law.
Then, it can only consider the incomplete evidence available.
Science cannot (at least yet) address the supernatural aspects of THE flood described in the bible -only the natural aspects -and it must consider what is actually stated and what is not actually stated.
It cannot accept or hope to prove that God told Noah to build an ark or collect animals. It cannot accept that natural weather patterns -or anything else -could be altered by the decision of God.
It can consider whether or not the whole earth was covered with water.
It can consider what would result from rain falling everywhere and water rising everywhere simultaneously -accounting for variations in rain intensity, rate of rise, etc.
It can consider whether or not some animals (perhaps they collected only every "available" animal) may have been collected on an ark and moved not a great distance.
It can consider whether or not a global flood would have killed this or that life form not on an ark.
It can consider how life forms could naturally have evolved, moved or repopulated.
It can consider the natural results of the natural things described in the bible -but it cannot assume that the account is complete even if true -and it cannot consider a God able to act by fiat.