why does the rating matter, kids purchase 18+/M rated games all the time (call of the dootles for example).
Parents buy kids 18+ rated games.
Same for 18+ DVD's.
But the studios don't care about DVD sales, they care about Box Office sales.
While kids can't buy an 18+ DVD, they can watch it if purchased for them. But by law, a kid can't see an 18+ film in the cinema, even with parents permission.
Which means the studio is potentially cutting off a large audience by having a high rating.
So if the film meets a lower rating hopefully there will be better figures from the Box Office.
As for parents not letting kids see 18 stuff, it's mainly just being protective.
I wasn't allowed to see 18s until I was about 13. My cousins weren't allowed until they were 16, and as young kids they weren't allowed to see 12s.
This instance is just 1 weird mum (or rather this youtuber since I can't really see that the mum is calling for it) asking for a lower rating because she is protective, but at the same time wants to give her son what he wants. It's not really news worthy since it won't happen.