Competitive misery is a good phrase I think! Well, I mean it's not good but what I mean as a description of the opposite of finding common ground and working together rather than focussing so much on differences and what is "us" and what is "them."
I think in some ways, the disability analogy is relevant, but not quite the same either. I agree that the experience of growing up disabled and becoming disabled later in life will be different, will involve different challenges for those involved, but there will be many, many similarities in their experience of discrimination within a society that is not inclusive of nor values disabled people as it does non-disabled people.
I do realise that amongst disabled people, there are divisions and differences, varied political views (small and large p) so it's far from an homogeneous group. Perhaps someone will correct me if I'm wrong, but I don't think there are any or at least not many people who were disabled from birth who refuse to accept that those who became disabled later in life aren't "genuinely disabled."
I agree that gender is a "social construct," just as I believe race is. Women (whether trans or non trans), didn't create the concept of gender but to some degree, at least in some situations, still observe some aspects of gender if only as a means of survival in an institutionally sexist society. Also, because the concept of gender and gender privilege is so entrenched in society, I think it may be virtually impossible to completely distinguish between what we are and what we do because of our sex and what we are and what we do because of our gender (whether we choose to engage with that concept or not - other people will do so when regarding us!)
Right, must get out and enjoy that sunshine! I know this is a tricky, tricky issue that touches on so many raw nerves and painful experiences for all involved. Maybe it's naive of me, but I still just wish we could focus on what we share over how we differ, talk to each other and learn from each other, and be stronger and have a better chance of making some difference by working together.
Oh, and I've found it really useful reading the comments here. Always learning, always absorbing things that inform my thoughts and feelings, so thanks!
(Where's the sunscreen? :))