The internet can be used by anyone, even those who happen to be somewhat blind. People always find a way. So, with that being said, do you ever cater to users with disabilities? Maybe you have a user with eyesight problems, and they can't view your site properly. Would you make a theme just for him? I think that would be an awesome thing to do, considering that's taking time away from your life to make something. But, if you help one person, it'll show that others can ask for similar help too. Some people have other issues, like color blindness too.
So you want to cater to as many people as possible I think.
So you want to cater to as many people as possible I think.