I'm betting rose is SLOW now. He lost that step, and without it, he's 6 foot 3 and can't play D, can't drive, can't hit open 3's. He's a backup without that speed.
He's cleared to play and choosing not to. I think he's an average player now, and shitting his pants hoping to fake it to off-season then maybe fly to whever Kobe flew to get "young" again in Germany.
Why else is he avoiding coming back?