Twitch viewer count is a pointless metric.
For one, these view counts are largely bots. SquareEnix is less interested in pumping the count than Activision. You go in these RWF streams and there’s 2000 viewers and someone says something every 2.5 minutes. You go in an FFXIV stream with 145 viewers and the chat is rolling. WoW is notorious for fake streams, someone is putting in extreme effort to prop them up.
For two, say legitimately there’s 50,000 people staring at these boring streams of nothing. That is people who are both interested in WoW, but not playing WoW. Why would you want 1/3rd of the possible concurrent players watching streams of someone else playing the game?