That's more a commentary on 2025 than 16 year olds I assure you. In the 90s adult relationships weren't particularly mysterious to your average 16 year old.
I mean you leave with whatever take suits you but don't expect buyin for some revisionist narrative that casts 90s era 16 year olds as infantilized incompetents. I'd like to point out that the majority of kids that age at that time had cars, jobs to support said, and relationships of their own of varying levels of "adult"-ness.