No, it is not. Are you purposely being glib?
You purchase a subscription, you purchase items from the auction house, you purchase items from other players, you used to be able to purchase items with dkp systems if your guild ran those. Like... that is what the game is about.
It's mindboggling that you think gold, can lead you to "win" anything in wow. Because one thing gold can't give you, is skill.
Pay to win, the term in MMOs is typically only meant towards monetization of the cash shop resulting in direct power gains over top players. Which NOTHING in Blizzard's cash shop does that. Literally fucking nothing. So yeah, it's very fucking annoying that you don't even understand the basic argument going on, yet feel the need to reply stating incorrect facts repeatedly.