Whether the Islanders added Horvat's AAV mid-season or offseason is not the point. Do you really not comprehend that?
This is why I constantly call you out for being a troll. You demand hyper specificity when you know it's unreasonable or unfalsifiable, and the argument doesn't call for specificity at all. It's straight out of the Jordan Peterson school of debate, and it's obnoxious, bad faith rhetoric.
No one is going to be able to point to a player like Kopitar being traded because there's only one Kopitar. Moreover, no one disputes the claim that large AAV players being moved is rare. It is rare. But it DOES happen. Your insistence that it doesn't, and it could've never happened, is why this argument continues.
Jack Eichel. $10 million AAV. Traded mid-contract.
OEL. $8.25 million AAV. NMC. Traded mid-contract.
PK Subban. $9 million AAV. NMC. Traded mid-contract.
Ryan O'Reilley. $7.5 million AAV. Traded mid-contract.
Shea Weber. $7.8 million AAV. Traded mid-contract.
Need I go on? I didn't even include all the players who were traded and immediately extended for high AAVs, or players added via free agency with high AAVs, because surely you'll pretend those don't count.
It is absolutely reasonable to believe that if Anze Kopitar were made available sometime between 2016-2019, he could have been traded. Would the Kings need to retain? Possibly. Would they have received a lucrative return? Potentially.
I can't argue the specifics with you because this trade never happened. Your insistence that it couldn't have happened under any circumstance is what myself and others are disputing.