We do let teenagers into nightclubs for other people in the same age group. See e.g. this (admittedly old) article: https://www.cypnow.co.uk/other/article/youth-nightclubs-club... I don't think these sorts of events are particularly popular, but that's more because teenagers don't seem to be especially interested in them rather than because adults object.

>Is what you're proposing a common position amongst gay men?

What is it that you take me to be proposing? Also, whatever it is, how would I know if it's a common position among gay men?

Or is it that you're just dogwhistling "Are all gay men pedos?" – in which case, the answer is no.