A novel idea, I guess it comes down to price in this case.
EDIT: I say "fuel efficiency" referring to the fact that there are gasoline-fueled versions of this same type of vehicle. I realize the Solo is battery powered.
I'm not sure I agree with that, but there is some logic that to thinking that a larger, slower, clunkier vehicle might lead to fewer fatal accidents.
A vehicle that can take the same corner at higher speeds can also take more difficult corners at lower speeds and is a lot more forgiving.
My father-in-law hates that I ride a street bike, and he frequently texts and drives. I'm like, you are directly creating the scenario for me which you are warning me about. The complete lack of realization of this makes my eyes bleed.
Let's be honest, nobody really believes doing wheelies, lane-splitting or being able to go at 130mph actually make us safer. That's just what we tell our moms when they're worried about us, and we know they won't be reassured by the truth - which is that we know what we're doing is dangerous but we're going to keep doing it anyway because it's fun.
Most if not all of the inherent danger of motorcycles is due to the existence of cars, driven by distracted people. You can mitigate just about all risk of riding a motorcycle. When I want to be an idiot on two wheels, I'll go mountain biking, or downhilling, or ride my dirt bike. On the street I keep my ass as safe as possible.
Bikes a) take up less space, b) don't cause traffic jams, c) are only more unsafe than cars because of people in cars not paying attention. Funnily enough, bad behavior on a bike is regarded as 10x worse than bad behavior in a car, despite the fact that a distracted driver in a car can easily cause 10x the damage, and that no one on a motorcycle is scrolling through their Instagram feed while riding. Let's be realistic - more people are distracted in cars than on motorcycles because you need all of your limbs to operate a bike.
You say you've seen someone pulling a wheelie and it "needs to be banned" (it already is illegal, so I don't know what your plan is here), well I have seen easily hundreds of distracted drivers of cars who can actually end my life because of their actions. No one in a car is going to get killed by a motorcycle, but the exact opposite happens all the time.