Posting like this exists because you have no way of knowing who even plays this game right now. People just post random things.
BfA benchmarks:
https://www.youtube.com/watch?v=KPTg_B6zLMk
Intel I7@5GHz + RTX 2080 and you get 30-40fps at WORLD-QUEST BOSSES, less in RAIDS.
144Hz / G-SYNC for 30-40fps at best? Yes go for it!