So many assumptions....but never enough 'what ifs'.....dry suits flood and dive buddy may not be near or able to assist or if diving solo not exist.. solo=self-sufficient; every diver should have "Plan Bs" when faced with an emergency that they can execute without assistance.....loosing a droppable weight can happen, ain't the end of the world; but in all my decades I have only had one weight go on a walk-about without my permission...guessing nowadays instruction on correct response to a 'blow up" [buoyant ascent] is not taught or practiced [flare/exhale]...again, your choice, drown trying to complete a deco stop or go to surface for a chance at surviving. DCI is bad; drowning is worse. ..dropping weights should be practiced , quickly accomplished and easy....if negatively buoyant and you can't drop weight to ascend and other options for surfacing are impossible you better have a buoyant ascent plan.... or you are DRT [Dead Right There]...got to surface to live....
Always risks..... but this is not rocket science...if you don't not have self-rescue options and have practiced them you should not be in the water...at least that is my opinion and I could be wrong...