Are you joking? First of all, there are studies out the yin-yang that will support a myriad of different views. That goes without saying.
Point is, we don't need to get so esoteric about the issue - all life as we know it, subsists solely by the principle of male and female (barring the remote exceptions of single-celled creatures).
This is an intrinsic principle that cannot be denied or altered. Thus, this determines normality and healthy behaviour.
Yes, I agree with you, within my limited knowledge of this matter, that some are born either androgynous, imbalanced in hormones/testosterone/estrogen, mixed or confused genitalia, etc..
Theses are the rare exceptions, and therefore, do not establish the rules. I cannot imagine the pain and confusion that must go through the person's mind that suffers from either one of these, or any, preconditioned anomalies. I cannot imagine the pain, and I denounce any ridicule or abuse that may be laid upon them for this uncontrollable and unwanted condition. But, again, I do not consider this to be something to embraced, the peculiar behavioural patterns that come alongside such a phenomenon must be curbed.
We can argue all day if people who have anger issues are born that way, or delusions of grandeur, or any other mental condition - we make attempts to desist such behaviour associated with these predispositions, we don't endorse these acts.
The problem here, with the most part of pro-LGBTQ people, is that you feel just because you can't tangible detect the harm, that such behaviour is therefore benign on all accounts.
I disagree, lustful, perverted and abnormal desires do invariably affects one's character.