Since feelings are only a biological impulse, and we humans frequently suppress our impulses in the form of self control, it's much easier to look for that oxytocin fix in a more appropriate arena.
The military has been doing this for ages, forbidding officers from fraternizing with enlisted. And plenty of civilians abusing positions of power have proven the wisdom of such a policy.
Huh?
Where there's a power imbalance, it's easier to ban a class of abuses than to figure out the small percentage of cases where both parties are genuinely afflicted by mutual biological imperatives.
How would you, an outside party, determine whether the superior was really [infatuated, in love, whatever], and not simply taking advantage of their situation? Or how would a judge determine that? Is it worth it to the company to work through that process every time it happens? What about the people who really were victimized, but the evidence is circumstantial and the court says otherwise? Isn't it easier to exclude the small pool of people that are subordinates and tell the supervisor to find romance anywhere else?
Precisely. There's some sort of "if you have authority you must be better than me" feeling and "better than me" admits no flaws or human variety at all, apparently. Some folks want perfect Gods to follow and keep failing to make them from people made of meat.