If I am right as someone mentioned above.. It was set over stronger set..How it is possible to get better set after floping top pair vs floped set? In that case floped set is gonna become full house if opponent hits set on the river or the turn ,right? Yeah only in case that opponent has stronger pocket pairs hand this scenario is possible
I really don't know what you're getting at, but this is the point:
You're saying he shouldn't be
bluffing in these games because he's playing against rich donkeys who will call his bluffs with weak hands.
In this alleged hand he flopped middle set. He wasn't bluffing. And if he is, indeed, playing against rich donkeys who will call him down with weak hands then getting all the money in was the right thing to do. The fact that he lost to a higher set isn't particularly relevant (unless you're wrong about the people he's playing against, which is very possible).
Also, a hand like this shows the value of retaining bluffs as part of your game: even the most loose-passive player will learn to recognise a tight player who never bluffs, and that'll make it harder for the tight player to get paid when they do hit big. Dwan's bluffs and image will be part of what makes it possible for him to win big pots when he does catch big hands.