OK obviously I wasn't paying enough attention and was only checking poker news here and there so couldn't see the majority of the cards. I assume both players had people telling them things like the quoted so yes that makes it an obvious call after the 3bet but the 3bet was the problem imo. If people were telling Jesse things like this then you would assume that Greg would balance his range more.
I dont think was a concern for Greg, optimal play here is just to play every hand optimally in a vacuum, Antonio made a comment about Jesse's body language when he made the 3bet (the same read he'd had a few orbits ago when Jesse 3b/fold Q8o) so it's actually pretty likely Greg had picked up on the same thing and this played a decent role in his decision to 4b/jam.
I don't think it's necessarily an obvious call with QJs here, I think the call is 100% a correct one, Busquet was saying in the commentary KJs would be a call for him, I think Jesse is expecting to see a lot of suited Qx/Kx/small PPsand with 22million dead and the fact Merson is a very tough opponent I think caling is better than folding.
Like you say, 3betting not the best though