Modding doesn't automatically mean pirating, neither does dedicated server. Who reasons this way knows very little about PC gaming. Communities give the best PC games more longevity, also thanks to modding and server programs. Without longevity and devoted communities some games very buggy at release but with high potential would have died before being given the opportunity to show their value. And the most devoted communities don't condone piracy, with the only exception of games not produced and sold anymore.
Edit: this said, I'm not so naïve to ignore the high percentage of piracy plaguing PC games, but piracy, modding and dedicated servers aren't the same thing.