The number one reason I have a problem with this is because a lot of whiny "ex-vegans" on YouTube or Internet forums were never vegan to begin with they were just on a diet, and when the wind changed, so did they.
Vegan isn't a diet like Paleo or Atkins. Those are diet plans. Veganism is not a diet plan. WFPB is a diet plan, but you are not required to stop wearing leather on a WFPB diet, nor do you have to adopt a WFPB to be a Vegan. The two things can compliment each other, but they are not the same thing.
I certainly want more people to stop eating animals, but I want them to continue to refrain from eating animals, I'm not excited about people going "vegan" for a week, a month, or even a year, then quitting. The reduction of the word vegan down to a diet is part of the problem because then you get all of your orthorexics and narcissists who "try vegan" in the way someone else might try on a dress or a suit, then discard it if it becomes inconvenient OR they try so, so hard to be a perfect whole foods, oil free, fruit binger that they wonder in two or three years why their hair is falling out, and it's so obvious to everyone else it's because they aren't consuming enough calories or fat, but they decide it's "veganism" so have a steak.