Framing it as an accessibility feature is just citing your own anecdotal experiences and biases, which are meaningless because I have several autistic people in my own social circle who hold my opinion: that the only way to properly convey tone and text is to write properly and read attentively. The right interpretation for what I write is the one I wrote, and if I ever catch myself caring about the Le Epic Updoot Meme Point score on my posts or comments (which I have disabled on my Lemmy app, so I can't even see it) I will stick a loaded shotgun in my mouth and pull the trigger with my toe.