This is an excellent post, wonderfully illustrating the topic. I'm a cis-gay man who's ex had her egg hatching when I was with her, so I've seen these realisations close up. I've also had several self realisations that have gone through these same processes. The first when I initially realised I was gay at 12 years old, starting bodybuilding at almost 40 years old and coping with the body dismorphia that comes with it, and most recently, through tictok videos, realising I have ADHD.
As the writer says in her conclusions, these comics and experiences can absolutely relate to cis people as well as trans, as at one point or another, we will go through a dramatic realisation about ourselves we didn't expect. Often this is because we finally have the language we needed to have this realisation, and this is why creating diverse spaces is good for everyone.
Mastadon has definitely improved it's user onboarding process. When I first tried, and failed, to use it 3 years ago it was awful. Signing up a year ago was a painless process. It may not be fully ready for the mainstream just yet, but it's definitely getting there.