While you are probably technically right, I think you are over estimating the risks involved. The booster will be under a parachute, travelling relatively slowly, and there will clearly be many safety precautions and features involved. They will certainly have a stringent check list before proceeding with the attempt as well as some sort of fail safe cutting of the lies if something goes wrong.

I would expect the chance of a serious accident to be very low.

Also keep in mind these sort of mid air captures were well practiced by the US during the Cold War to capture returning photographic film from spy satellites. Although that was with airplanes not helicopters. A variation of it is actually shown at the end of James Bond Thunderball where he and the girl are rescued from a life raft via a balloon and capturing plane.