Food trucks are also usually founded by a person with a vision and passion. Someone who wants to do something completely different with their life, a cook who thinks they have what it takes to go out on their own, etc, and that can be something that goes beyond even the reputational incentives.

Certainly not always, but I'd wager far more commonly than a generic ghost kitchen out of a shared kitchen with an Applebee's or out of the back of a cheap warehouse district.