It's all about money. If the game is M for mature you are possibly excluding a major section of gamers (17 and under) which in turn means less money. I'm positive if they created Destiny 2 and it was given an M rating Bungievision would do anything to get it dropped to a T. Either way they would have to add offensive language, sexuality, and maybe drug and alcohol references to even be considered M and those don't even fit into Destiny given the launch that is Destiny 1. I mean maybe if they bloodied up the combat but again, they are striving for the T rating so they wouldn't do that. If you think about your enemies in Destiny vs Halo they're very similar except there's actual blood shown in Halo where in destiny I guess it shows decompression of their helmet when you headshot? I'm not sure but there's little to no blood in it.