And why should it BE a problem.
Fault Singapore’s fanaticism all you want, such a rider wouldn’t be touched. Someone attacking him would be very likely to get brutally caned if not worse. While I don’t advocate that degree of vengeance in America (they recruit troops to carry this out based on how heartless they say they can be), I do think that the US could come quite near to that level of public safety if honest people could bear any reasonable kind of defense arms without hassle.
I don’t fault Singapore, as they seem to have their act together. However, this being the U.S., we’ve all generally been taught that living in high crime areas, going out in the wee hours that generally that’s when something bad is disproportionately bound to happen (and inevitably, we already know the general age, race, and gender of the perps involved). It’s sad that it’s that way, and it shouldn’t be, but until a cultural shift occurs and the major contributors to the crime rate are taught to appreciate behaving in a civilized way, it’s not going to change (point being, people shouldn’t have to be forced to resort to carrying weapons to protect themselves to do something as simple as going out for a late-night walk or ride).