I'm not really a health nut, but when you look at the way soda and highly processed carbs are metabolized it's pretty scary. Given the rates of obesity and diabetes in the US, I rank soda and snack foods right up there with cigarettes in terms of long-term healthcare costs.
I then switched to sweetener, but the bees kept coming. They had either associated the smell of the coffee with the presence of sugar, or were addicted to caffeine.
I felt it was better to leave the coffee to the bees than to argue with caffeine-addicted africanized bees.
I can imagine that if they ever took that away there would immediately be a mass exodus of employees.
Oh, and I do drink the coffee without sugar or any sweetener and with skim milk (mostly) so it's not that bad for my health.