The fact of the matter is that...Divers often dive with relatively little exposure protection. Some manufacturers are pushing non buoyant exposure protection as well and this seems to be more common.
Also why would the BC need to be removed before the diver is lifted onto a boat?
Little or no exposure protection in the warm water areas that draw lots of newbie or simply vacation divers (like me) who are more likely to screw up through rusty or non-existent skills.