I have to admit that it does throw me when women adopt the traditionally Catholic signs of the priesthood such as the Roman Collar, etc.
Then again, I am never sure how to react to, say, an Anglican male priest either, as I don’t think he’s an actual priest in the Catholic sense (but at least some Anglicans think they are) but don’t want to show disrespect for his method of serving God either, even if I don’t think it is what he thinks it is. I don’t like to see a non-priest who looks like a priest.
To me it just seems to go against what the signs represent. The Roman Collar and vestments and such should be a sign of priesthood, and when a non-priest uses them it bothers me. When that non-priest is a woman, it bothers me slightly more, partially because it’s more obviously false, and partially because, in her case, there is not even the possibility that it become true. I try not to be bothered, but my first reaction is that our symbols have been stolen and twisted to declare a falsehood to be true, even though I know that this is obviously not the intent.
I do, of course, understand that Protestants are, by definition, not Catholic, and that many of them (you) reject the entire idea of an ordained priesthood, and so that their woman ministers aren’t even claiming to be what we claim to be impossible. But the signs still bug me.