I'd strongly disagree.
Wrath had its scourge invasion as well as plague event.
Cata, the very next expansion, had deathwing and elementals
MoP had garrosh trying to conquer the world and splitting the horde. Maybe the average horde person experienced this more than the alliance.
WoD is a lucky hiatus (lol greatest threat ever promotions)
Legion had demon invasion
BFA was effectively a world war where capitols were raised, and an old god was on the loose corrupting various parts of the world. There was also the side effects of the sword and azerite.
SL had the scourge invasions again.
Since Wrath the only real peace time the average joe has had was in WoD.