I don't think piracy has anything to do with this. It's just the over saturation of the game market.
I'm pretty sure I obsessed over only a handful of games because I knew they were games that everyone else played too.
If I had the feeling that <1% of my friends will have even heard of the game I was playing then I definitely wouldn't have given a shit to "catch 'em all". Age probably also plays a role because I no longer have any friends I talk to so again there's no bragging rights incentive and no hope that I'll ever get to have nostalgia trips talking to other people (even online) about most games.