It's just culture. It's been 16 here since forever so 16. It's what we're used to, it's when kids leave school. 16 as the age of consent is fine to most Brits since that's the way it's been since Victorian times. Not saying there's anything special about it, but it's normal here. Not sure why you're this bothered about the age tho when that's not my concern here.
It's the concept of having a legal line, versus the idea of when people actually have sex.
25% of women in Britain lose their virginity before the age of 16, regardless of the law.
And marriage is not required in any legal sense for people to have sex, nor to raise children, nor to have a committed relationship (I say this as a married man).
Equally, being married is no guarantee that people will raise children, or have a committed relationship. Or have sex, although I say the last with my tongue somewhat in my cheek, and as a married man.
Your original post...the one I commented on...was that it makes absolutely no sense to have a lower legal age of consent than it does marriage. But...apart from a potentially moralistic position which you're welcome to...I see no justification of that position at all. Why doesn't it make sense? Marriage and sex are not the same. And a legal contract is part of the deal with marriage.
You seem a bit confused, unless I'm reading you wrong. I'm saying yes 16 year olds should be able to marry, but with parental consent, as it's been for decades here. It matches the aoc.
Not confused, I'm trying to understand your position. Your original post was brief, and derisive of disagreement. I'm just trying to work out why you think there is no sense to be made in disagreeing with your position. I find that hard to believe. Having said that, I suspect our views on what the laws should be are very similar. I just don't find it easy to dismiss opposing views.