"When PC gamers are willing to pay the amount of money it costs to fund a high quality modern AAA title"
Perhaps it's the other way round. Some ports from console are rubbish, reviewers tell us they're rubbish, so the publishers know they can't charge £50.
But sometimes I think it's just too much like hard work to provide the textures and frame rates that can make a game look good on PC. Sometimes I think it's might be done deliberately. If console gamers could see just what could be done with a PC they might be inclined to walk away from consoles. Which upsets Sony and Microsoft who have hardware to sell...