Are the majority of people who bet and play cards incapable of ever getting better no matter what they are taught or told? In order to improve, you need to have a degree of humility and be able to admit, "hey, I do this wrong."
i was watching a buddy play the other night when he got in a tough spot. He had queens on a very wet board against two players who rarely show aggression unless they have the goods. It didn't end well for him. I broke out the poker stove and showed him the odds of his play, why he was likely behind in that situation and why he needed to fold queens. So he was shown reasoning and math to back up why he should fold. At the end of it all he goes, "That's pretty cool, but I ain't ever fold queens there man." ...face palm.
Some people are a lost cause, are you one of them?