Not even half a percent.
Not even 1 in every 200 people.
This is what we fight about when we define, debate, and defend "vegan." This is the impact we've had in decades of defining, debating, and defending "vegan":
Of course, we know from decades of experience that there is no magic wand we can wave to convince others to magically go vegan. And furthermore, we know that the vast majority of people who go vegan quit and go back to eating animals.
Please believe me, over the past three decades, I have heard every single argument about why our message must be "vegan." Many times. Many many many times.
One definition of insanity is doing the same thing and expecting different results. The suffering of farmed animals isn't philosophical. It isn't a matter of semantics or purity or baselines or "truths." It is real – brutally real.
And any sane individual should realize it is time to try something new.