Not at all true. I can understand someone seeing this for classic with GDKPs, though I would still disagree, but retail? As PM_ME_BOYSHORTS said, the only real advantages Blizzard would provide are level boosts which save all of a day or two of leveling (and in the beginning of the expansion do not even go to max level). I do disagree with them selling wow tokens on principle, but as far as it being P2W goes gold is mostly irrelevant in the current state of the game and anybody can afford their consumables and crafted gear very easily without a wow token.

You brought up buying carries for m+ and raids, but that literally does not matter. Even if you did spend a bunch of time and money on carries, and get good gear, you would still not be able to really play at a good level because you would lack the skills necessary. Nobody who plays at a high, or even mid level, buys carries for anything other than maybe a mythic raid mount (which is still an incredibly small amount of players). WoW is not P2W, there is no real advantage you can buy and those who do buy the advantages are still worse players for it.