You've probably beaten Market Garden to death here

Entirely appropriate for MARKET-GARDEN, though.

 

If one reads Horrocks own autobio, one finds a map, that clearly shows three separate roads converging on Nijmegen, yet his orders were to use the center road only, which of course permitted the Germans to converge on XXX Corps.
Everything depended on XXX Corps getting to British Airborne in Arnhem ASAP, which would never happen up one road.
I believe it was Roger Cirillo's PhD thesis on Market Garden that noted that Brereton's insistence on dropping American airborne as divisions, not in individual battle groups on individual objectives, pretty much guaranteed the Americans would not reach those objectives until either the Germans blew them up or met them with enough force to slow the capture of those objectives, thus severely delaying XXX Corps up that one road.
It was a Charlie Foxtrot in many, many ways.