E.g. the most common motorcycle in Vietnam is the 110cc Honda Wave with a top speed under ideal conditions of ~60mph. It literally would not be called a motorcycle in the US.
I don't think any city in Europe is as anti-human as your standard American metro, suburb, or small town.
Also: European metro areas are full of two-wheeled not-motorcycles, like the Honda above.
In other countries they are a huge means of transport.
"Oh, but this is acceptable risk"
Well, for billions, a motorcycle is too.
But somehow no old bold riders.