[brightlancer]

Child labor laws are presented as intending to protect the child, but the reality is it's created to protect adult workers from cheap competition.

That's what PP described (even if they didn't realize it):

"It's because an adult can do almost all jobs where child labor would be used, usually it's just that adults are more expensive;"

It's not about morality or protecting children from harm; that's just the lie that's used to sell it.