I'm not judging anyone's choice of vehicles for whatever their reasoning, only replying to a truck owner who sees no apparent value in some else's choice of or for the development of a narrow vehicle and how it may free up parking space for your pickup. Drive what you like, like what you drive.I have read criticisms and diatribes regarding pickup truck and SUV use for years. What often isn't considered is the resource consumption associated with having multiple vehicles. I have had a pickup and a commuter vehicle for most of my adult life. And that has made sense to me given my rural living and urban/suburban work. But when one considers the carbon footprint of the second vehicle (the commuter), it makes more environmental sense to use the pickup exclusively.
There could be an argument made that the 5% of the time I need to haul things or tow my tractor from point to point or move 4-5 people around or yank my Zero-turn mower out of a mud hole or commute in poor weather could be solved by renting a truck or other large vehicle. There are efficiency and convenience factors which come into play.
I might be projecting, but I assume the majority of people are not trying to be douches. Yes, they (and I) look like douches commuting alone in that large vehicle. I do not think any observer has enough information to adequately judge.
Independent of all of that, the infrastructure needs to be capable of supporting commercial traffic as well. Outlaw my 1/2 ton pickup if you must, but there are commercial needs for vehicles of all sizes. This seems to have gotten lost in the lane sharing/brick pattern/lane narrowing discussion above.