Even if you're just sort of leaning onto one of those things, it looks like there's absolutely no room for anyone's knees. And what happens if you're shorter o

Even if you're just sort of leaning onto one of those things, it looks like there's absolutely no room for anyone's knees. And what happens if you're shorter or taller than the norm? One hopes you can at least adjust these up and down - otherwise, a tall person will effectively be fully seated with their knees jammed into the seat in front of them, while a short person will be able to dangle their legs.