I haven't spent any real time on scooters, but been riding with all kinds of PEVs. I think you're right that scooters are deceptively safe looking. EUCs these days are pretty safe within their designed operating range. But I'm very biased because they're my favourite device.
Weirdly now, handlebars feel like a superfluous crutch - but I still don't risk riding a bike without a good grip on them. Risk assessment is a funny thing, and ultimately comes down to lived experience.
I wish. When I tell people I've been exclusively using Linux for more than 10 years they give me a blank look then repeat the question.