First of all, awards are meaningless. The only hardware that matters in this league, and I mean really matters, is MVP’s and championship rings.
With that said, awards are fun! Whether they actually mean anything or not, they are something to get fans discussing. Sports are fundamentally based on the idea of competition, so why not create a bunch of arbitrary competitions for people to argue about?
Regardless of whether you think “6th Man of the Year” is an important award, Jrue Holiday is the guy that should have won it, rather than Jamal Crawford who was worse in virtually every single way.