It is just a lifestyle people use to feel like they are better people than meat eaters.
If it isn’t a self-serving ideology, it definitely cosplays as one very convincingly.
Who are you trying to fool??
Edit: why am I still arguing with some guy who claims he believes picking a salad and killing a newborn are the same thing and then goes and calls others hypocrites.
No, I've set out to prove that omnis have nothing but some stupid hypotheticals ("what if plants are sentient??") and ad hominems and I think I've shown this in your case quite thoroughly. Additionally the reddit thing of you constantly reinterpreting of what you said is just a bonus.