I'm suggesting they aren't "set" at ball handler when their primary piece there has a serious injury (btw, radsoxfan is actually, like, a doctor, so maybe if he's worried, we all should be), is one of the worst defenders in the league, has been exposed as being able to be bullied because he's tiny and is looking for a max contract he doesn't deserve.
Also, to extrapolate, that this team's window hasn't arrived yet as they aren't getting by Cleveland (even if they move Irving) until Lebron leaves in a year or GS for at least a few years until they break up, which rides us out of the contract period that Crowder is under. So, while he is a nice piece, he's not making much of a difference for Boston and while he is a nominal starter, he's a complimentary piece that is best used as an asset. Whether that be for draft picks, young players or to fill a more thin position than wing, the best option is most likely to move him, even before we get into talking about him being a malcontent or not.
Also, ruling out surgery =/= not missing significant time. It doesn't even mean it's the right decision or one the team made. Heading into a contract year for your one big pay day doesn't exactly inspire one with best long term decisions.