The board is 7 people. I'm unclear what makes this awkward or inconvenient.
However, you could look at it the other way - if you take any group of 5-10 people I bet they're disproportionately something. Very few groups are selected evenly from all of humanity.
Regardless of your political or religious views on people's right to exist, simple politeness if nothing else should prevent this sort of comment. I assume you wouldn't say it to their face, so why say it here?
I agree with that statement, but consistently calling it out kinda seems to be having the opposite effect.
The banker thing would be bad optics because of conspiracies about it, but I'm not aware of an equivalent.
Except, you know, these specific people are openly trans and explicitly choosing for themselves to make a point about it.