That's true, and I think there are plenty of open minded people who are perfectly fine with the transition process.
However, in spite of being very open minded and supportive .... there can still be that initial bodily reaction that some people have when they "clock" one of us. It's not necessarily a sign of hate or revulsion, simply their reaction to something they saw that conflicted with their initial expectation, and then quickly processing how to proceed.
Getting to a point where I don't see that reaction from people is definitely a goal. However, if it isn't one that I reach, I'll be ok with that. (fair to point out, if its someone you know, or meet, you usually only have to see it once 😉 ).