I suspect that a side-effect of the popularity of electric scooters will be that passengers will habituate a bit to seeing faster things on the sidewalks.
That's unlikely. Even if 95% of people did, there's still 5% who won't. The real problem is bad design that places preferential use lanes for cyclists too close to parked cars and expects cyclists and occupants of motor vehicles to figure it out. This results in serious injuries and deaths of cyclists.
Authorities should be encouraging cyclists to ride at least 6 feet away from parked vehicles. One way is to paint shared lane markings to guide cyclists to ride in the safest position in the general purpose lane far enough away from parked vehicles.
That really doesn't work. First, a cyclist is moving at least 15 feet per second, which is the average length of a passenger vehicle, so by the time they're besides you, they're already past you. Second, your view is blocked[1] by the B and C pillars of the vehicle as well as the headrest, so you won't be able to see a cyclist approaching.
The second best approach is to check the outside mirror before opening the door, but that doesn't work for passengers in the vehicle. The absolute best approach is to never, ever, ride in the door zone, regardless of whether or not door zone bike lanes are present.
One interesting way of reducing doorings is to teach drivers and passengers the Dutch reach. Basically you should always use your furthest hand to open the door as that involves twisting your body and encourages you to see a nearby pedestrian/scooter/cyclist.