Speaking as a queer person, the concern i have is that these kinds of laws *always* get used to restrict kids from accessing any information about queer life *of any kind*, because cishet society views *anything* involving queerness to be imherently sexual and thus prevents access by under-18s.
Combine with refusal to acknowledge queer life in any other medium, and you have a situation where queerness becomes once again unavailable in any way to queer kids. Which puts them at greatly increased risk of STIs and bad relationships and no way to find community.
It's got nothing to do with adults' rights.