Do they really want someone to break down in front of them and share their rape or some other horror story?
Yes. Sadistic people love that sort of thing because they interpret it as evidence of their own superiority.
Why on earth would people do this?
Some do it because they simply enjoy the experience. That's an example of an act that has intrinsic value to them. Others do it because it is an instrumentally valuable act: it produces something else they enjoy, which is increased prestige and attention within a fairly radical subculture that values aggressive behavior. This puts it in the same category as spouse beating or "honor" killings.
People who view the act of publicly humiliating or harming someone else as valuable, either intrinsically or instrumentally, will put themselves in a position to do so as often as possible. It's a taste they have. They *want* the conflict and the drama. For this reason, they don't do what most normal people do, which is to seek out forms of employment or entrepreneurship that align as well as possible with whatever personal talents and constraints they've got. Their desire for drama creates a gigantic conflict of interest for them, and it's something employers need to watch out for. It's not the religion that creates the problem, it's the desire for drama.
Lots of people have constraints that affect their suitability for different professions or lines of work. To a person whose religious beliefs (or lack thereof) do not present any constraints, or who is willing to make compromises by providing goods or services they would not personally use or by serving customers they do not necessarily approve of, it can seem strange. But there really is such a thing as a person whose will is so completely in alignment with his or her sincerely held religious beliefs that they are genuinely distressed if they cannot practice those beliefs 24 hours a day, 7 days a week. Their religious beliefs guide and inform every aspect of their behavior including how they do their work. Such an individual is simply not capable of compromise. For that individual, religion really is a constraint on employment.
Just because a person has deep religious faith does not mean he or she is constrained by it from an employment perspective.
Similarly, having religiously imposed constraints on one's behavior is not the same thing as being a sadistic jerk. It's possible to be a sadistic jerk regardless of religious perspective.
Those pharmacists would be in the red section of the attached diagram:
* edited for typos