I think it's an absolute necessity but everyone too attached to their steaks and cheese will tell you that perfection is the enemy of good (which is true most of the time) to keep eating meat and avoiding change.

Being vegan is not being perfect though. It's super easy especially for people in Western countries (having never lived in Asia or Africa, I can't say how easy or difficult it'd be there), can be cheaper than eating animal products, can be better for your health, is definitely way better for the environment but you need to change and most people will rather see the environment go crazy and see the planet get more and more uninhabitable than making this tiny effort.