Maybe it's not Singapore that's an outlier, but the US? Delivery in Spain, Portugal, and other European countries is by motorcycle.
I believe in the US, a car driving license is fairly easy to get and used cars are very cheap. Plus, given the driving culture, I assume that in the US people just don't think about motorcycles unlike in Europe or Asia as a viable way to get around.
See: https://techcrunch.com/2025/03/08/new-doj-proposal-still-cal...