Couldn't agree more Climate.
Most people couldn't tell you what EV even stands for. Back when I was living in Vegas I was once asked by the Director of Slots at the Hard Rock why I didn't play there anymore. When I responded that the video poker payouts were all very poor he admitted that management had made the decision that they could make more money by tightening for the squares and taking less volume than loosening for the sharps and getting all the action.
Also, most people are going to play where their friends are, they are staying, etc. Doesnt matter that Harrah's may hit a soft 17 if their buddies are there and the drinks are cheap or even free. As you said, they are there to have fun. Absolutely NO difference to them between a house edge of 2 or 4%.