I have not seen any evidence tonsugges they are harmed or die in the process of production. They do regurgitate the nectar as part of the process to concentrate it into honey (an interesting process) but they do not suffer any injury during this process. If they did, the cost to produce honey, which is done naturally as a measure to survive over winter and through times of lower availability, would outweigh the benefits. If you kill several bees to produce enough honey to make one more bee, It makes no sense. Any animal that did that would die, even with human intervention.