Which is why I’m surprised that so many vegans are on the fake meat bandwagon. The fact that they eat so much processed food clearly shows the claim that they’re doing it for health is poorly thought out.

This a fundamental misunderstanding of what veganism is, namely:

a philosophy and way of living which seeks to exclude—as far as is possible and practicable—all forms of exploitation of, and cruelty to, animals for food, clothing or any other purpose; and by extension, promotes the development and use of animal-free alternatives for the benefit of animals, humans and the environment. In dietary terms it denotes the practice of dispensing with all products derived wholly or partly from animals.

A plant-based diet for health is normally a “whole foods plant-based diet”, for which a mountain of well-studied health benefits exist. But vegans who eat plant-based for the animals can have any level of care about their own health that they want just like any omnivore can; that part is a spectrum.