That's pretty hyperbolic. I'm not sure even the most chicken little of Spurs fans thinks Wemby is going to demand a trade after one year. There is, however, legitimate concern about the idea of this FO getting the best out of the Wemby era when they have (1) never built a contender from the ground up, (2) a pretty subpar recent draft record, and (3) extremely questionable in-game rotations, decisions and game management.
This is a FO that added Wemby to last year's team and somehow got worse. I feel like a lot of fans are trying to pretend they expected this season, like it was part of the plan, when literally no one was predicting this before the season nor implying it should be the "planned" approach. The only reasons to be confident that they're going to be better next year as a result of adding a couple more rookies are: (1) The bar is extremely low, and (2) Wemby will be one year older.