I was introduced to daily caffeine usage by the most religious christian engineer I worked with at the time. We would drink 2 cups at once to get a jolt.
I don't think I need to ask about engineering, as many of my coworkers have 4+ cups of coffee a day. I can't imagine how many of them take other stimulants/anti-depressants, etc...
From professionals to laborers, why would we assume drug usage is any different?
There is also some folk history that when coffee started to become popular in Europe, several clergy were concerned about this Islamic drink (coffee having been introduced to traders by Muslims, who cannot drink alcohol). Since wine is central to Christian liturgy, they were concerned that Muslims had developed an alternative to wine and this could be the work of Satan.
This was allegedly put to rest when Pope Clement VIII tasted coffee and deemed it to be an acceptable Catholic beverage.
for some religious adherents a drug may be a hindrance, while, for others, it's helpful. how can we make sense of it all?
I trust you can understand caffeine is not equivalent to amphetamines