well no, you still can't park on the sidewalk in LA, only the parkway (area between the sidewalk and the curb) or the apron (part of the driveway between the sidewalk and the road).
in any case, i would love to have this kind of inexpensive rackless bike sharing in LA. the metro has bike sharing in downtown (https://bikeshare.metro.net/), but it's not rackless and is only economical if you live and/or work there and can use it often. santa monica has expensive, racked bike share (https://santamonicabikeshare.com/), blah.
(i used to bike quite a bit in LA but my bike was stolen... from a well-lit metro station, no less.)
Sure, there's no doubt that cars still dominate in the US but yours is a hysterically fallacious comparison.
Additionally I find that bike parking is literally never enforced unless you're directly inconveniencing someone who then calls it in.