I'm a professional filmmaker. I happen to also be the kind of person who hears the phrase "owner/operator of a taco truck" and immediately thinks "ooh, that sounds cool. I'd need to optimise the menu to minimise ingredient costs, obviously, and - ooh - I wonder if I could use extremely locally targeted Adwords stuff to market it and -"

(I've never even eaten a taco. )

Nonetheless, I also know a lot of other people who make films. Many of them don't have the particular bit of their brain that automatically starts writing a business plan when it hears any cool idea. However, they still make films - often really good films - and enjoy it. Sometimes they enjoy, or at least appear to enjoy, making their movies more than I do.

A very large number of those people also have an actual bill-paying job.

There's nothing wrong with creating just for the love of it. "Amateur" - one who engages in an activity for the love of it - is not a dirty word, and contrary to popular belief is not automatically inferior to "professional". You can achieve a pretty astonishingly large output if you're focused - I have a friend who was averaging >1 (published) novel a year whilst also running his startup. You can create great work. And you don't have to make the inevitable compromises that you do have to make if job #1 is "make enough money off this thing to live".