> They're dockless, you can end a ride anywhere
This is, for me and my wife, the entire point. We had a docked bikeshare system in Seattle and the docks were never where we needed one, particularly since Seattle's topology--a city known internationally for being incredibly flat and dry--meant that the docks on the bottom of a hill would be perpetually full and the ones at the top of the hill were always empty.
But these things are an absolute godsend for someone who can walk, but can't walk far, or who has the occasional struggle with hills. The bus or train can't go everywhere, but a scooter can get you between the spot where the bus let you off and the spot where you want to go. That's how my wife and I use them and they're amazing and, frankly, I hope they never go away.
> The companies running them all seem content to just proliferate scooters all over the street with no regard for expense or the non-scooting public
This is probably true, but I think a lot of people just don't see themselves as "the scooting public" except for the brief time they might be using one.
It's the same problem with cars, just downsized a great deal. We're incapable of building separated infrastructure, mostly due to cost, partially due to fear of loss from space given over to cars. We try these bandage workarounds, like scooters, but because we've half-assed everything except the infrastructure for cars (and because people's expectations are so high around the new idea), we wind up with a situation where everyone is frustrated because no one's needs feel met even though there are clearly uses for them.