I’m 187cm (like 6’2 or something) and I have this issue. Anything that’s not a 4 seater on buses or regional trains will lead to my knees pressing into the seat in front if I don’t sit perfectly upright (which isn’t a great option for a 90+ minute train ride). Some bus seats have so little leg space that I flat out cannot fit without sitting diagonally (they’re actually worse than the last cheap airline I flew with somehow, tho tbf that was like 8 years ago and might be worse now).

When these buses come once every 15 minutes at peak time, it’s not even really a capacity issue, frequency could absolutely be higher if desired. Though 4 seaters existing means it’s generally fine, and my bus rides generally aren’t long enough that I can’t just stand instead. Designing a bus with that little leg room without 4 seaters would be a real issue though. Accomodating everyone and efficiency for the average person will always be a balance to strike, but everyone for whom it’s feasibly possible should at least have some option to be comfortable on public transport.

I fucking hate being tall.