Topic on Talk:The big list of third-party DRM on Steam
1 pirated copy ≠ 1 sold copy
But if I take 10 pirated copy, at least 3 of these people have the money, but are just the kind of aforementioned greedy morons.
They are the reason for me justifying DRMs in some cases.
Then you could probably have your stories with crappy protections, where the cure is worse than the disease... but I don't think this problem is technically intrinsic