Everyone who keeps posting this ignores that there has been vegan cat food for years, supplemented with necessary vitamins etc and backed up with scientific research. They didn't make it up out of thin air as you seem to be implying. Sceptism or disagreement is fine. Painting the other side as lunatics is not.
Pssh everyone knows the only correct diet for a cat is their natural one: giant ocean predators (salmon and tuna) and corn-fed livestock. All mixed up with preservatives and taurine and ash, just like their mawmaw cats used to make!
Chocolate covered roaches and Neocons exist, doesn't make it a good idea necessarily. Taking an obligate carnivore animal and force feeding it lab produced food-adjacent slop that exists nowhere else in nature, just so your little pet can play along with your fad diet to validate your fee-fees surely strikes me as complete and utter bat shit lunacy.
As the other user pointed out: it is equally insane to feed a cat tuna, beef, pork, etc, that has never been a part of their natural diet. Most cat food is equally artificial and 'lab-produced slop', unless there's a cat food out there made from mice and birds. Both kinds will have to do the same amount of research to make sure that it will actually fulfill a cat's dietary needs. The vegan one just causes less harm.
Usual soy brain takes from huffing too much vegan propaganda. Meat is meat and contains enough nutrients for the obligate carnivore. You seem a little slow so I will repeat it once more; inventing loopholes to jump through just so your obligate carnivore unconsenting pet can follow your ridiculous fad diet is the height of insanity.
Since you mentioned commercial pet food, to be clear this is a strawman as that shit is equally obnoxious and only an ignorant chump would feed it to their pet with any regularity.