geeeezuz...he re-signed with OKC after just about everybody said he wouldn't re-sign there. It's not a stretch at all to think he would have re-signed in Portland; OKC sure isn't more appealing to a west coast guy than Portland. And it's not a stretch to say that playing with Dame would have been more appealing than playing with Westbrook. So, I don't buy your assertion
you also need to keep in mind that 2018, for a variety of reasons, had the least amount of league-wide cap-space for years. And the 2 or 3 teams that did have cap-space enough for a max contract were small market teams with bad records. No big market team had any cap-spac; neither LA team did. It was actually in his interest to re-sign for the full-Bird max with his current team, and then have his agent push the situation the next year