Hi Jon! As far as the health argument is concerned, I think it's super important. I'm a vegan ultrarunner and my races are typically 30-40 miles of running--myself and basically all of my competitors don't eat meat in order to speed up our recovery times.
That's just an anecdote--I suggest you check out the documentary "Game Changers" on Netflix. It shows how veganism is super beneficial for elite athletes. (The book "Born To Run" also mentions this).
For everyday people, veganism reduces blood pressure and cholesterol and increases fiber intake, which increases overall health. It also lowers risk of cancers. (resource: https://www.clevelandheartlab.com/blog/vegan-plant-based-diets-heart-disease/)
Like the article suggests, I always recommend a month of two of veganism. Veganuary is a great option ( https://us.veganuary.com/). If you're religious, maybe do a meat-free Lent!
See how you feel after a month! The first week or two may be tough, but after 30 days most people won't look back! You'll be glad you did!