Maybe a more important question for you is, why do you care? For most of us here, it probably doesn't matter if someone categorizes wrestling a martial art, or a sport, or a lifestyle, or a challenge or what; just that we have gotten or continue to get what we and others want from it. What are you trying to get out of wrestling?
From this and your other TLDR post, it sounds like you decided to give wrestling a try but have doubts that it will prepare you for MMA. Or that it doesn't teach you self-defense skills. Or that you think it relies too much on strength & endurance rather than technique. Or something else, I don't know, it's hard to tell if you're earnestly asking or just philosophizing, or if you're one of Jimmy's alts trolling us. But try taking a step back and thinking about what you want out of wrestling, then ask us specifically how wrestling can or cannot help you get there. You'll likely get more thoughtful and useful responses.