Teams have been able to just go small and limit his effectiveness on defense and he's not good enough offensively to punish them for it. For a guy that's making $170M over the next 4 seasons I just don't really see a team that he puts into title contention.
I don't think teams are limiting Gobert's effectiveness so much as they're exposing the fact that Gobert is the only guy the Jazz have on the floor who can defend at a high level.