It's perfectly reasonable to advise against good values in a game that's won by people who strategically abandon theirs. If you want to win, that's the strategy to follow.

Not necessarily a lesson for life unless you view life as a finite game to be won. But in that case, it's probably the best strategy as well.

I don't view life like that and I'm guessing you don't as well, but I'd advise anyone to be cautious of their interactions with people who play to win.