Seems fair enough.
Parents will just buy it for their kids if they are under 18 anyway.
That's how these things generally go here.
About 10 or so years ago they tried to bring in legislation to punish parents who purchased 'R' rated games for under age kids after "do gooders" whinged and bitched but, they realized that it was going to be completely unsustainable so dropped it.
I mean under 18s still get alcohol/tobacco with monotonous ease so.......
The Lame Stream Media in the USA these days is nothing more than a Democrat Party protection racket.