No, really, it is. But you know what's not okay? Pretending they're perfectly fine, and that how they should be (because things have always been that way) and telling people who have a problem with those things that they are wrong, wrong, wrong (or worse).
I've seen this blog post before, and there are several other discussions in fandom about how to be a fan of problematic things, but Craig Michael Ranapia's comment on CJA's post on how to get your friends hooked on a show linked to it, and I think it really explains how I feel about it in much better ways than I can. I'm not gonna c/p the whole thing here, but it's absolutely worth reading in its entirety.