Fair, yes, required, no. But it's entirely beside the point. If you seek to hold an opinion, (even if that opinion is "we should wait to decide") justifying that opinion by "the courts haven't decided", you are using a logical fallacy.
"I want to hear both sides of the argument" is a reasonable statement.
"The courts haven't adjudicated it so I am not allowed to have an opinion" isn't.
I recognize that you did add "(or at least until we see some evidence to back up the claims)" which is better than most people do, but it was still added as an aside, rather than the main point. You explicitly said you withhold your condemnation or moving instances until a finding of fact is made.
Frankly, I will admit that you're getting from me a lot of my frustration for frequently hearing this opinion regarding much worse and far clearer allegations, so maybe I'm a bit more frustrated by this, than is justified by the actual situation, but the fundamental point remains, this is a common logical fallacy that almost nobody recognizes.