I think the OP (if legit) is looking at the issue from the wrong angle.
Turn radius limits. See AC 150-XX series for airport design requirements. Size (wingspan and distance between main gear and nose gear) does matter with respect to runways and taxiways... Just look at the A-380... Several major airports needed to be "upgraded" to ensure the 380 would "fit"...
The "wide-body" has an amazing passenger pleasing feature not found in narrow body transports- The Double Aisle. Twice as efficient for in-flight service and potty break foot traffic
