All depends on the cause.
That being said, and off to the land of conjecture, if it is the cocktail of insecticides, antibiotics, HFCS, etc., etc., that is the typical industrial apiary motif then, yes indeed - backyard beeks (& all others) who have more holistic oriented practices will save the day. If the cause is something more systemic (e.g. GMO pollen) then geography (proximity to GMO crops) would be the prevailing factor. No matter the cause, diversity could only be beneficial.