Earlier quoted context omitted.
But it's a large deadweight on the economy. It requires the production of considerable amounts of parking that is never, or almost never, used or needed by anybody. It makes parking easier only by hiding the cost of parking in everything else, in a wholly regressive way. And it's not a "commons problem" like air pollution - it's just the government deciding that a particular private good is nice, and everybody should…
That precisely describes the example I gave (sales tax that funds pointless art projects noone likes), except the cost to the economy, and the impact on the poor, is readily quantifiable, unlike hypotheses of various opportunity costs regarding parking. Saying all parking is funded the same way and has the same externalities is both reductionist and absurd. Furthermore, what value empty lots provide is entirely up to…
If what you desire is a walkable or Main-Street-y type urban form, you have to tackle parking minimums. Likewise if you want compact row housing and multi-storey apartments. If you don't want those things, that's fine, no problem. But if you do, you should consider that the dense urban form of older downtowns and main streets is basically impossible to build with current parking regulations.