No veganism isn’t a moral stance. It CAN BE a personal moral stance as well as a dietary one, but morality is not required and may not factor into it. It may be for YOU, but perhaps a person’s stomach just handles meat poorly in some fashion and therefore they choose not to partake. Don’t claim that everyone must ascribe to your moral stance. They do not.

That simply isn't what the word means. If you think veganism is a diet, then do you think vegan leather is meant to be eaten?

Oreos used to use lard, in the 90's, they changed the recipe to use vegetable oil to make it kosher, and also, coincidentally, vegan. I suppose this hypothetical "vegan purely for taste" person just happened to hate Oreos right up until then, even though they taste the same. They must have the most sensitive tongue in the world. "The Princess and the Pea" has nothing on them.

You suggest that someone's stomach "handles meat poorly," but that would just lead them to be a vegetarian. Does their stomach also "just happen" to handle dairy, eggs, lard, gelatin, etc poorly too? Does wearing leather give them a rash? If animals are harmed in the production of something, but no part of the animal made it into the finished product, do they, what, get assailed by malevolent spirits?

You are simply wrong about this, and your position on what veganism is is completely incoherent and nonsensical if you stop and think about it for 10 seconds, let alone actually read anything about it.

Veganism is the practice of abstaining from the use of animal products—particularly in diet—and an associated philosophy that rejects the commodity status of animals.

I am begging lost Redditors to read literally the first sentence of Wikipedia about a subject before trying to speak as an authority on it.