Brandon Belt may need knee surgery, so why wait?

Brandon Belt is reportedly going to need knee surgery in the off-season. The Giants know this, as they haven’t been playing him and have told the press about his likely need for the surgery. So my question is, why wait?

It’s a lost season. Buster Posey has already ended his season to have hip surgery after a questionable delay that may have included concerns about salary and organizational depth in the catching position - neither of which seemed like good reasons to hold off, but I guess they thought they might still be in this thing. They were not. And Posey ultimately got his surgery.

So, what’s the difference with Belt? If this injury is hindering his ability to play well (and if you look…