If it’s not a big deal then verifying your age shouldn’t phase you anymore than verifying your age to buy alcohol.
I don't like that either and some years ago I stopped providing my ID on request. Corporate vendors (eg supermarkets) still insist on asking my birthdate. I'm in my 50s.
Paternalistic attitudes infantilize society and that's a lot more shameful than most porn could ever be. Absent specific reasons to believe abuse or exploitation is taking place, lawmakers need to stay out of other people's business.