Yeh, probably sucks for a lot of disabled people as well.
As a tall person myself, I have used similar and haven't had an issue. But there are taller people than me, so maybe I am not tall enough.
Bus stop benches are also horrible. As are most seats in fast food restaurants. Airplane seats are also too small.
Some seats aren't meant for a long time of sitting, or have other priorities I guess.

There is also only 1. Not great if you need a break at the same time someone else does.