As a thought exercise, any time we see widespread lawlessness ask whether it’d still happen if, say, a random citizen could get $100 by sending a video to the city (ala NYC’s truck idling law) or if the city employees like cops or parking enforcement had similar incentives. There are downsides to that kind of thing and I’m not suggesting it as the ideal general policy but I think it is important to remember that most of the time these are not problems we don’t know how to fix but rather problems people don’t think are their job to fix.
It's shooting themselves in the foot (because people driving less results in less congestion and competition for car parking spots), but as this thread demonstrates, there's no shortage of counter-productive thinking around non-automotive transportation.
In theory, you are correct.
In practice, drivers feel that they are entitled to it, to the exclusion of parking for all other vehicles.
If London can find plenty of space for scooter parking (and it has), I’m sure any North American city can.
The apps will remind you repeatedly to park correctly and will fine you if you don’t, which I’m pretty sure they’re required to do as part of their licensing conditions.