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.
In this particular case however, the office had wheelchair-accessible rooms so I don't see why the booths had to be accessible as well when they serve the same purpose as the rooms.
How do you not understand that if your business offers something, it has to be accessible and available to everyone? Otherwise, it's discrimination.
> Life has always been unfair.
And laws like this ensure the world doesn't become even more unfair.