I just returned from Singapore. The central business district is full of these scooters. As a Dutchman, personally, I don't see why people don't bike. Cardio & transport in one. (This also why I don't understand the appeal of the Segway)

The issue is that these scooters should not be on pedestrian walkways / sidewalks (and they are in Singapore), because there is too much difference in speed.

Singapore recently came with strict rules about usage, so perhaps there is a middle ground: https://www.mobilityscooters.sg/blogs/blog/are-mobility-scoo...

I'll stick to my bicycle for now, though. In Holland, I like the trend of "Bike roads" (https://en.wikipedia.org/wiki/Bicycle_boulevard) as the deeper issue, certainly in London, has nothing to do with electric scooters, but with a reduction in automobile traffic, and giving back space to bicycles (and electric scooters, why not).