I basically agree. In my experience as a rider of one, the main downside of urban kick scooters is that they lack infrastructure. They're too slow to be bikes and play in traffic, but their existence tends to offend and frighten pedestrians, even though their control over acceleration is quite good, about as good as someone running. That quality makes them chimerical, one of the most unpredictable users of the road, and one of the factors in me hanging it up was having my day ruined by people getting upset at me.
The biggest real dangers come from grooves and potholes(I took a spill that needed stitches in my younger days, trying to ride inside a groove) and from using pedestrian infrastructure at speed(cross-traffic can lead to near-misses where the car doesn't expect you to jump out so fast, or the bike expects you to plow through and you stop instead).
The electrics are a nifty invention, but also one that makes their character more like bikes. They fit in a little better as all-purpose transports, but they also lack the simple convenience of a light kick scooter.