I think he might have meant Arnhem, not Antwerp.
correct.
They scenarios that you mentioned usually START with the inept airdrop operational plans of Brereton Browning.
A properly executed airdrop operation would have guaranteed Allied success.
Monty's plans for Market Garden were good, it was Allied Airborne command that screwed it up.
The strategic basis for the operation were also correct, which is why it needed to be done (rather than advance on patton's sector)
1.) A successful M-G allows the Allied armies to bypass the Westwall, and the casualties delays that they ran into. (Hurtigen Forest, Aachen etc)
2.) It would also allow for a left hook to isolate Holland, meaning that the (unsupplied) 15th Army could be captured more quickly, and prevent the Dutch winter famine.
3.) It would also capture the areas on the Dutch coast which had the V-1 V-2 launch sites