I think e-bikes are inherently problematic, in that they are often bought by non-cyclists who are terrified of hills/headwinds etc. After a few months riding, and conseqently improved fitness, they begin to realise that actually, its not that bad, and they want more exercise anyway, which is what they got the thing for in the first place, so they take the battery out and discover that they have bought a very crap, heavy, cumbersome bicycle.
Disability, whether age-related or not - I can see the point, keeps you on the road. I think everyone else is being 'taken for a ride'!