That made no sense Goodfella...
I only don't play games like COD5/4 and Killzone because i hated Killzone's demo and i can't stand wargames like COD. It's a personal opinion. I never have bought a wargame and never will as they're all similar in my eyes. I know people will say different, but that's their opinion.
Bizzle hated X-Blades and Shaun White Snowboarding, yet i'm finding them fun. Sometimes, it's not as people can't plat harder games, it's a personal choice. Some slate me for playing Hannah Montana, i had more fun on it that i had with COD, that's not just as i got a platinum, it's just a personal choice.
Yeah, some people can't platinum some games, but most of my mates aren't picking up harder games purely because they don't like them. As a group, my mates don't like wargames (excluding Warhawk). Yet we all picked up Wipeout, my mate is trying to platinum that, he even thought of going for the Warhawk platinum but, just because he doesn't platinum Killzone or COD, doesn't mean he a terrible gamer.
So there's two sides, those can't and those who don't want to. Those who can't aren't worse gamers than the ones who can or don't want to. Maybe it's a certain type of game they're great in. I'm terrible at flying games but my best genre is probably a wrestling game. I'm still gonna pick up HAWX, even if i can't do it i shall try my hand at it. I won't platinum it as i can't. Yet i don't play COD as i don't want to. It's all a mix. You can't say 'You don't play ______ as you're rubbish. (Unless they have 1 trophy or they're as i like to call them a 'One Zero'. It means Level 1 0 Trophies.)
End of the day each trophy gone for, each platinum aimed at is due to personal choice.