I don't think you're crazy, but you are painting with a broad brush. Tri-Ess is just like any other franchise where quality controls aren't strict. The quality of the chapter depends on the people who are currently running the show. I've no doubt there are some chapters who are limited with their POVs, but there are also others who are more fluid. A friend was heavily involved in a chapter in the midwest. She by no means adheres to the strict party lines. At one point she even felt she needed to transition.
Even then, Tri-Ess groups are only a small percentage of all the TG groups throughout this country and others. Here's a list of Tri-Ess chapters in the states. There are only 30 of them!!! :p
http://www.tri-ess.org/SSS_chapdir.html
You can imagine how many other TG support groups there are.
There is no Tri-Ess chapter where we live but my SO belongs to a huge group that meets monthly in a city two hours away. This group has been around for decades. My own SO has been a member for about 10 years. The current president is a woman who transitioned (with SRS & FFS) years (and I mean years) ago and her lovely GG wife. The vice-president had SRS a few years ago and shortly after her surgery she proudly showed me the pics on her cell phone.My SO and I have been to many meetings there and we always have a great time. It's hard to tell, but it looks to me as if the membership is split 50/50 TS and CD. I have never, ever seen anything like you describe above. No CDer in that group runs from any TS and vice-versa.
I do wish you would stop looking at things just from just your own perspective.