That’s the tricky thing with biases, right? They’re formed by our experiences. My experience interacting with vegans has clearly been different from yours, so that may explain why you would think I’m denying reality. Anyway, I hope you can keep an open mind when talking to vegans who use the word carnist. Not all of them are bigots :)
I think exercise is helpful to everyone who experiences stressful or frustrating situations regularly. Our bodies are still built for fight or flight responses, and physical exertion helps get rid of that stress response.