I don't understand why you think managing the Organization intelligently is some wild offense.
Its not intelligent if it costs us a game or two in the next three weeks before he comes up and we end up missing out on the division by a game. Baseball of course doesn't really work like that where one guy wins or loses a game, but we're in a very tight race and any one game might end up being huge and every edge you can get helps. And I'd rather win the division and use up Mayo's eligibility than get the Wild Card and have the draft pick possibility next year. There is no way to tell if Mayo up tomorrow versus Mayo up in 3 weeks is the difference between those two things, but its not impossible that it could be.
All of this is moot if he can't play defense. If that's the decision, that he isn't good enough to play there, then he isn't an option to replace Westburg and that is fine. But if he is good enough, then I have a big problem with prioritizing the draft pick possibility over optimizing the roster for the next few weeks. It's a much lower bar to clear for him to be an upgrade over Urias than an upgrade over Mountcastle, which was who we were talking about him replacing before Westburg's injury.