I have had several years of experience with bees.
We don't have proof that this enzyme is bad in any way. Also beekeepers have been trying to get farmers to stop using the pesticides that kill them but not all farmers switch to alternative chems, the alternatives are usually expensive. Giving the bees an enzyme isn't turning them into frankenstien bees. I need to do more research but as of now I think it akin to giving them vitamins, beekeepers (even ones who try to be all natural) have to cheat to keep the bees alive, I've fed mine pollin patties and sugar water which is artificial but if I don't then they die.