it is one I trust medical professionals to make.
But they are not all the same. I'd trust some of them more than others. That's why they have rules and guidelines and professional standards.
So working with a medical professional and having explored other issues, I think they can give informed consent.
That's what the campaigners don't want people to have to do. No obligation to do much work with a medical professional or to explore other issues first.
Where we would probably agree is that informed consent isn't possible if people are lied to
Yes, we do agree on that, but I'd see factual honesty as a minimum requirement. Necessary, but not sufficient.
if an 18 year old wants to be sterilised so be it.
Interesting take, rather black-and-white thinking there.
I've never understood why women have to wait until we are past childbearing age for a sterilisation-
Because people can change their minds especially between 18 and 35. You've never changed your mind about anything really life-shattering?
You don't see a difference between someone who has had children and someone who has not? Or between a 18 year old and a 30 year old? Or between 30 and "past childbearing age"?
For what it's worth, one of my transsexual friends did tell me (many years ago now) that transition was a matter of convincing her psychiatrist both that she was sane and that she genuinely want to do something quite insane. And she did succeed.
I don't think there's a God given right to love your life free from regret I'm afraid
That's a very dismissive thing to say; of other people's profound suffering and (potentially) of your own. "Regret" is minimising.