If a child was exploited on stage as part of a comedy act - for example - of course that needs censorship. Doesn’t it??
There is a difference between pure censorship, a system of licencing for age-restricted content and clearly illegal acts.
Exploiting a child on stage (how is this exploitation to manifest itself? some would say a child working on stage is exploitation full stop. Is it the number of hours, or if they are being subject to sexual acts or something else? we have laws around that kind of thing which would be applied)
Having age classifications for films has had some interesting results over the years. Particularly if you compare what is restricted in different jurisdictions. For example there are often comments on the fact that in the US relatively violent films are allowed at relatively young ages, but the mere hint of sex or a female nipple will get an NC certificate (or 18 or whichever it is)
I remember when Jaws first came out (because I'm ancient) that it was certified 18 (or as it was in those days X) but later it was reduced to A (12 now?) after having some of the worst scenes deleted. Some studios are very very careful about what they include in order to have the correct certificate for widest distribution etc etc.
So there really isn't a reason why such certification couldn't be applied to all shows (having said that upthread someone said that JS's shows are over 18 and he is pretty strict about applying that himself).
So censorship - in that illegal things are not allowed, is fine. But a series of certification for non-illegal acts might help some people?