Earlier quoted context omitted.
I think I can guess the point you're trying to make, but you did a pretty bad job making it. There's literally nothing wrong with your example.
There's literally nothing wrong with your example. You may believe there's nothing wrong with arbitrary discrimination but I don't.
EDIT: granted, writing posts in English isn't arbitrary, but neither is installing small booths, there are good space-utilization benefits to it; it's unreasonable, because those benefits don't trump accessibility to people in wheelchairs.