So if I released a game built entirely around eating your own shit, and it became so massively successful that every game copied my brilliant "innovations" in coprophagia, you would happily eat your own shit while defending my game against anyone who points out that dogs have been eating their own shit for centuries and it was generally discouraged?
I am, of course, talking about regenerating health and auto-aim. Two of the linchpins in the halo formula. See, ever since online games existed, people made aimbots and invulnerabilty/regeneration hacks. These aren't what I'm talking about when I say other games beat halo to regenerating health, auto-aim, and everything else the captive LIVE demographics claim it did first. But being forced to rely on the game's built in assistance measures does not make a better game, it just makes an easier game. But most people can't really tell the difference, so MASSIVE SUCCESS.
If you remember, it took a while for non-halo games to "get" that halo's success was based upon auto-aim. Killzone, for instance, was a pretty massive flop both times because the developers didn't get the auto-aim right.
The fact every game followed suit isn't really a valid claim either. "Holy shit, easy games are making money. That must mean easy games are awesome!" The reality its just more proof people are cretinous dipshits who will, literally, buy anything.