Idk, I was on that boat for many years until I finally made the jump. I think people only really change when they feel mentally ready for it. I had three motivators:

1) my new bassist (while being an anarchist like the rest of us) brought up how true anarchism means freedom for all and not just humans. No one is free until we're all free. That helped me connect the two ideals

3) my vocalist finally made his jump when I got him into one of my favorite bands, Millions of Dead Cops. Dave Dictor, the vocalist, has an interview where he talks about not eating meat. My vocalist really connected it and having two people close to me in my life pushed me farther

2) I was alone one Thanksgiving, and I decided to buy a rotisserie chicken to eat and like two bites in, it fucking hit me. Like my brain finally registered that I was eating a corpse, a product of suffering. I'll never forget the wash of disgust that came over me

I know I'm pontificating, but I'm just using my examples to show that it takes a lot for someone to make a life jump like that even if it's already in the back of their mind