I don’t really see this as a net good if it means old ladies go from struggling to walk to electrically-assisted tricycles.
Struggling to walk to the shop is literally the only exercise my mum gets. It works up a sweat. She often takes a seat halfway on the way there and back.
She does literally no other exercise. And this is not uncommon in her peer group at all.
If the journeys being replaced by e-trikes are car journeys then more power to them. But given the limited amount of exercise being undertaken by significant numbers of the elderly if this replaces desparately-needed movement under their own muscle, under their own steam, then this is a really dangerous step IMO.