Because, unfortunately, they're all we got in terms of numbers. If we isolate trans activists, they are very few and they are not enough in speeding up acceptance for us. Doesn't help when most want to go stealth because of discrimination in the job market which slows the progress down because many people don't want to be the ones to sacrifice stealth for faster political advancement. Visibility and having a voice made up of many people is very important and without that, you can hardly wonder why we aren't a huge priority.
Call this stealth shaming if you will but it's the reality. If my parents won't come to bat for me, I can't expect strangers to do so. Maybe when I reach a good point in my transition, I'll start getting serious in activism.