Possible duplicate of What the "primarily opinion-based" close reason is for.
I think there's a litmus test here that is misapplied.
As an example, Capitalizing Stages of Diseases is currently collecting POB close votes. It boils down to
Should I capitalize the names of the stages [Stage I, Stage II] or leave them in lowercase?
However, the correct answer is that the capitalization is primarily a matter of personal choice, and the correct answer is "either is okay". That's different than an opinion.
This seems to differ in character from questions such as the fictitious
Do adverbs destroy otherwise well-written passages?
This encourages diatribes and flame wars and sword fighting and all manner of debate. It isn't a matter of personal choice. Whether you write a passage with adverbs is your choice, but whether it destroys your passage is the opinion of the reader, and has no correct answer. "It's a personal choice" is a correct answer to the former.
I realize I've led the witnesses, but is this the intended interpretation? Are we over-using POB in this way?