The catch is that native North American pollinators are adapted to native North American flowers and have a great deal of difficulty pollinating introduced species that are native to Eurasia. Given the vast majority of commercial crops are not native plant species, the only way to mass pollinate them is to use non-native pollinators.

Also, few native North American bee species are eusocial. That's another quality one would need to be able to use them the same way as commercial honeybees are used today.

The there is the issue of honey production.