[withinboredom]

I just stab them in the eyes and then say "now you'll care about blind people," then calmly walk away. Works every time. /s

In all seriousness, I ask something similar to the above: "Would you feel the same way if you got in an accident that left you blind for the rest of your life?" Sometimes this moves a few people to your side. I don't want to be the only one, but I do care about accessibility. I care a lot, for personal reasons. But like you said, you don't want to be the minority trying to support minorities.