Investor, you have failed to twist this plainly correct argument into something else.
I don’t know about the true airspeed for the swallow to fly off with the coconut is but it would be difficult for it to pick it up at zero and accelerate to whatever speed that is. Theoretically, if it could pick it up off a moving object of some kind, I would guess about 60 or 70 mph, maybe faster but it could definitely carry it if it’s wings didn’t fold up and it had some way to grasp it.
There’s two people that post here who can write pages on the forces and conditions affecting that experiment, Nidan and Talon. They both tested the limits of the most advanced materials, techniques and designs of flying metal aircraft at speeds not recommended trying at home.