Well actually yes it would do a lot for people who would otherwise be in danger of getting squashed. You are seriously taking this whole discussion way too seriously. No, nobody is seriously suggesting that diversion would bring anything of significance to the game. But I, personally, when I am in a roulette and the main tank dies (as they will), I would be in much less danger with those enmity management tools.
But, again, you're taking it TOO SERIOUSLY.