Sure it's problem but one that doesn't need a state nanny.

Kids could always get jazz mags from friends, find VHS tapes, be told stories, see topless women etc.

The difference here is that it's easier, but that's partly caused by indifference and technical illiteracy.

If it was a serious enough problem to warrant government intervention the larger public would be championing this cause.

They aren't.

That's not even withstanding that soft porn is often just people showing their bodies, which should never be a problem.