Well yea, but I'm assuming they use the same system, and WQ mobs and interactables are just flagged to be using dynamic spawn rates when people are on that WQ. And if 1 out of 50 WQ's doesn't have it, it's a bug. But who knows how it's done. It'd be interesting to see/hear how much they have to do weird and stupid workarounds and hacks just to get stuff working (kinda like what Bethesda has to do when still using Gamebryo from the 90's.
With a name like that and a take like this it's pretty easy to tell you're jaded beyond stone.
What exactly is "playing the game" to you? Because it sounds like you want a version of WoW that doesn't exist and has never even attempted to exist based on your signature lol. Maybe the Dark Souls franchise is a better fit for you? Maybe Candy Crush or Disney Starlight? Hell I hear Yugioh Duel Links just updated their app a bit, and Pokemon Go is better than ever.
Might do you some good to go out and touch some grass, anyway.
FOMO: "Fear Of Missing Out", also commonly known as people with a mental issue of managing time and activities, many expecting others to fit into their schedule so they don't miss out on things to come. If FOMO becomes a problem for you, do seek help, it can be a very unhealthy lifestyle..
"A youtuber said so."
"... some wow experts being interviewed..."
"According to researchers from Wowhead..."