Oden jumped right back up after getting hit and was barely damaged
In comparison, Zoro’s looking like he needs life support.
So yeah, I don’t see much of a problem. And even if i did, doesn’t really matter, cause as far as i can tell all evidence points to Hakai being a CoC attack because of the 覇 kanji. Why would a combined attack by two Yonko, CoC users, with an attack name that has Supremacy in it, not use Haki of the Supreme King?