people throwing their money away

I was playing in AC recently, and some guy stood with (A,5) against a dealer 6. I politely told him that he might as well take a hit, because he has a soft 16, so the next card could only help him. He looked ticked and explained that the dealer would probably bust and he didn't want to chance the hit. Why do people like this even play the game? Anyone have an opinion on whether it is good practice to offer advice to clueless players? Most of the time they do not seem to appreciate it, and would prefer to lose their money than admit they know nothing about the game....