You're outright wrong, I've detailed that here:
https://news.ycombinator.com/item?id=34351151And yes, motorcycles transport two people at the most - but for real, look outside a window and count how many car drives are made by single-occupants. In the UK, for example, it's 60% [1].
[1] https://www.statista.com/statistics/314733/single-occupant-c...