Hahaha more people completely miss the point. Bravo!
(Maybe read post #244 again for the explanation)
Actually, the flaw in your analogy is different than what has been pointed out.
The civil rights movement in the 1950s sought to end segregation. It did so by showing that segregation was both unfair and unjustified.
The current topic wants to maintain segregation, but alter the reasoning and the parameters of the segregation.
In this discussion, neither side wants to get rid of segregation. There are a few people who have suggested replacing segregated spaces with unisex spaces and both sides have objected.
One side wants to keep the segregation for what they believe to be the original reason, which they consider to still be valid.
The other side wants to maintain the segregation, but alter the parameters and modify the justification.
It's significantly different from your analogy. Both sides favor a segregated bus.
The interesting thing is that if we left it at that point, the two sides are close enough together that they should be able to find common ground, in my opinion. It's really the self-ID part that is a hindrance. The first group are willing to allow trans women into their spaces as long as there is some sort of criteria as well as an effective means to challenge a violator. This is the part that you are on the same page with the first group, which is why I keep saying that you and Emily's cat are not that far apart. (You also agree on sports.)
The other part of the argument is of course terminology. There are, objectively, four groups (ignoring gender fluid/non-binary):
Group 1: sex: male identifies as man
Group 2: sex: female identifies as woman
Group 3: sex: female identifies as man
Group 4: sex: male identifies as woman
Each of these groups is valid and equal (meaning no group is lesser to another).
For whatever reason, its not acceptable to have four categories with equal value. So we have to argue about which groups get paired into sets in what circumstance and what terminology to use for the superset and subsets.
I don't care a whole lot about this, but I can understand why both sides consider it important. There's a certain word that carries heavy symbolism for both groups.