Let’s go to the extremes here: let’s say I’m a vegan, and love snakes and want my snake to not eat live mouse, do you think I can feed the snake vegan snake food?

well i mean, snakes are pretty fucking stupid. assuming the snake can digest it properly, and gets the required nutrients, it should be fine.

However we can also consider that mayhaps you live in NYC which has a rat problem, perhaps you should just feed your snake rats instead.