It was actually stated by Sean Copeland aka Lorelogy aka the guy’s who’s job is to keep whole lore consistent as the Head of Lore… so it’s way worse than just Ion stating that.
“My team believes that continuity exists to enhance a story, not to tie the hands of creators,” says Copeland. “That really keeps me going, the simple fact that there might be someone each day that’s struggling with a piece of history that I can help with, and my support can help them overcome their challenge and inspire them to create something amazing.”
https://www.gameinformer.com/2018/08/14/a-look-inside-how-blizzard-maintains-world-of-warcrafts-lore
Basically the newest stuff is always the most canon so you need to basically throw the old lore out of the window as it gets retconned… which isn’t good.
Honestly the original lore was way more interesting.