We want to trade those guys for expiring contracts, so taking back Westbrook isn't really a burden for us. We also probably want to be able to trade multiple players for 1 in order to prepare for a Don trade. This helps us too.
I think this sentiment is mostly built out of spite for the Lakers, who seem stuck, and don't deserve a helping hand. I'm all for that sentiment, it's going to feel pretty awful if they win another title based on us helping them out.
Logically speaking, however, it really makes sense for both sides. If the Lakers can provide, unprotected picks that far in the future, it gets us a shot at a super premium pick vs the protected picks we would likely garner for our players individually.