I am in my 80s and I too was brought up to denigrate any woman who appeared 'mannish' (my mother's word). I doubt that Mom ever examined her own views, but I am here to tell you that one's views can be changed 180.

As for sharing public restrooms with transgender folks, how would I even know? Women's restrooms typically have closed cubicles; as for the 'lobby' areas of restrooms I personally have never seen anyone change clothes or insert tampons or anything of the sort there. I would be offended if a woman did either of those things because I would consider it inappropriate.

When it comes down to it, I'd say that this is not an earth-shattering issue. We are all human beings. We are all in this together.