Nope.There would be no affect. Most pot that is grown are clones from clippings not male or female. Therefore the bushes don't produce seeds or flowers. It's that simple. Bees aren't attracted to the plants. It's just a guess that growers who were producing males and females would not want bees pollinating their plants. Growers who are creating strains grow indoors and keep pollinators around their plants.
Clones are copies of the original plant and are female. The do produce flowers, which is what a smoker wants most. What they don't produce is seeds, which require a male plant and pollen.
Growers hybridizing to create new strains control pollination by excluding all insect pollinators and doing it by hand.