That said, most of the accessible features we are looking for are part of good design practices 101. For the most part we are not asking for special stuff, we want the game to have remappable keys, or played with a mouse, or remappable buttons on a controller. Not hard stuff.
Also keep in mind that 17% of the population is disabled. A few accessible feature may just help you be that next blockbuster.
As for the rest of your comments, those are all different departments, and I am sure that the voice actor is not being asked to fix bugs... it is kind of a strawman argument you are making.