My parents were both teachers. Mum quite liked all the crazy channel 4 stuff and we often watched them. We watched plenty of 18 films on the coach on school trips . Steve Beko and Mississippi burning were on the curriculum.
In other respects I was quite sheltered compared to some peers. That turned out to be a disadvantage.
Molly coddle children if you want but you will create a risk Averse, unbalanced wean with no tools to deal with issues further down the line.
They will be seeing worse on the internet already. Don’t kid yourself on everything is locked down.