Imagine a question:
I have to do <some task>. I am trying to do this task in <some situation>. I can think of two technically valid ways to do this task. Here they are:
Does there exist a clear cut advantage to Way 1 over Way 2 (or vice versa), or is the choice here just a matter of opinion? Am I just bike-shedding?
Would a question of this sort be subjective? The issue itself very easily could be, and, in fact, the question-asker is clearly not certain. But could there perhaps be an objective, on-topic question asking whether it is or not?
Meta-thought: Is this question opinion based? ;)