This a very valid point, but I think a guy like Westbrook would look at it another way too.
The NBA is about difference makers and 2017 Free Agency is stacked with them. So if you are a star, you either A.) decide your window is closing and try to form a super team. or B.) find a young team with talent on rookie deals and good contracts that has a great culture and willingness to build around YOU.
I think the Suns fall squarely into B. While LA will have the home draw, what would interest Westbrook I think is a young exciting team. Remember he's only 28, if he decides to leave OKC he doesn't have to form a super team. Instead, the idea of playing for a head coach you have a great relationship with, one hour away form home, get to be a beast on a team that has a mix of young potential stars and great chemistry role players, would be enticing.
Perhaps most underrated is the fact that Earl ALWAYS talks about family and how important it is for his team to be part of his family. If he has Westbrook's ear, the idea of coming into a great locker room that is a family environment and he gets to automatically be the patriarch, would at the very least make him pause to consider