It really bugs me how so many people act as if there's a magic "click here to implement [feature]" button, and completely discount the fact that Free Software like Linux is largely developed by unpaid volunteers.
Yeah, sure, they shouldn't need money and resources to implement accessibility features, they are super simple! Every other OS* has them!
*(Windows and Mac, both developed by small mom and pop shops)
@Len0w0ThinkBad there is an interesting aspect to this and that's getting FOSS/Linux used by governments (as in, paying local IT firms instead of big corpo). However they usually have high requirements on accessibility, which ultimately ends with a chicken-egg problem, because only big companies (e.g. Red Hat) are able to promise on those aspects.
So there is some chicken-egg problem right here, but I think that's solvable if governments would be willing to invest big in Linux accessibility.