I think people would absolutely pay $80 for GTA VI, but that doesn’t mean other games would be able to get away with it. Xbox already tried this and had to backtrack because it hindered sales.
"We think it’s in Take-Two's self-interest, as a publisher and partner to many developers, to raise the price point for the entire industry." says Bank of America on GTA 6's price. https://bit.ly/3PmsYgf