You could use this absurd logic to rationalize any action, no matter its effort or expense.
The fact is you are taking a legitimate issue (uncleared sidewalks) and transparently using it as a springboard to push some agenda against our "car-biased culture." Which unfortunately has clouded your thinking and rendered most of your post as emotionally fueled nonsense.
The simple, sober approach, without all the theatrics, is simply to petition the City to hand out more fines towards people who are not complying with the law.
I am absolutely relating it to favoritism toward driving, which it absolutely both partially stems from and concretely perpetuates.
But whatever, you're right, it is a legitimate issue on its own.
I agree with more fines, but that's probably not enough. Big, absentee owners—including some you might not expect, like churches—just absorb fines. What is, it, $110? That barely registers with some developer holding a vacant lot for future development.
That's why I think there needs to be some government backup, with billing to recoup the cost of the work.
This stuff needs to get done. It's a safety issue, not some pie-in-the-sky gummint program.