Yes and no. Video games are something that everyone enjoys of all ages. Could Blizzard go with cutting edge? Yes, they could, legally. However that is also bad for business given how widespread the hobby is. A lot of us have issues, esp as we age.
There is a good case to be made for making the majority of a game accessably and friendly for as wide a range of people as possible. That adding color blind options, spell lighting/flash adjustments, motion sickness adjustments, controller use, UI modifcations, text to speech, closed captions, etc are all GOOD.
There reaches a point though where you can’t make everything fit everyone in all instances. Trying is good though and if some X percent of the game is accessible that is good.
There are now motion sickness settings in game I think.