I do not even like wearing one on motorbikes, though one did save my life once, so I need to shut up.
I note some here refuse, normally people older than me, they ride motorbikes on footpaths too, those that just care not what the police think, say or do. Would not see that in the UK.
If motorbikes were electric and could "save the planet" there would be vegans self righteously riding them on the footpaths without helmets here too!
Actually this one looks sort of cool:
https://silodrome.com/exodyne-electric-motorcycle/
Seen a few that have good concepts, cool engineering, not vegans, more motorbikes,