Agreed. I have never seen an actual scooter owner park badly. It's always a rental scooter company. I object entirely to them just seizing the public sidewalks as the parking lot for their private businesses. And then I object again at the tragedy-of-the-commons effect when scooter renters feel entitled to drop it wherever they're done with it.
That's a poor comparison. Bike lanes are for public use; the space may change purpose, but it's still public. Companies scattering their privately owned rental gear on public space is a taking of that space.
Oh yeah, bike lanes are definitely for public use! It's the free parking that isn't— that's the one that's private individuals demanding the ongoing right to take up valuable public space by dumping their private property on it for hours at a time.