For me, it's a lot like kabarett said: I'm committed to social justice and to Wanting Everyone To Be In On Things, so why wouldn't I? I'm fairly neuroatypical and consider myself part of the disability rights community, most of my best friends have physical and/or psychiatric disabilities... it just seems like it's a natural fit. My closest friend in close proximity to me uses a wheelchair and we're blocked from doing a lot of things together because of accessibility issues, so the analogy, as kabarett said, is pretty clear. Further, I also get severe migraines and have trouble with color distinguishing and audio processing at times, so though I don't use adaptive tech, I do like to make sure things are web-accessible in other ways.