The existence of covid was called a conspiracy theory at one point, the term is used so loosely that it has lost all meaning and just used as a sort of cognitive stop sign. You could say the widespread use of the term conspiracy theory to mean something other than literally a theory that there is a group conspiring about something is itself a conspiracy and it would be consistent with mainstream usage, blame the people who watered the term down to be meaningless
The massive car sizes we see are because of government emissions regulations to begin with. That’s right, the “big truck to make up for lack of X” phenomenon was actually caused by people attempting to regulate how trucks are made without thinking through thr consequences.
People who reach for regulations tend to be bad with incentives, not always, but usually.