you guys should read the post again...he's not saying fold quad aces if bet into, this hand basically demonstrates how a worse hand won't pay you off if you raise, and you will be in a tough spot if you get 3 bet on river, especially given such deep stacks.

a thinking player won't pay you off more with their "flush" because they know their bet clearly represents a flush and that you won't raise him w/o FH or better on the river.