So, if something's illegal, and people are still widely disobeying the law 20+ years later, then it really shouldn't be illegal.
What, like murder? It's been "illegal" since Hammurabi's code and "people" still do it. I think we'd all agree that murder should generally be illegal -- the devil is in the details though. Was it self defense? Was it accidental? Et. al. File sharing admits of the same complexity: Was it fair use? Did the artist intend for it to available on file sharing services? Does putting my files in the cloud also entitle all my friends to access my music too, regardless of the artists' intentions?
Is murder "widely disobeyed"? I think a survey asking people if they share music illegally and / or they think all music should be shared freely would get a very different "yes" rate than if they were asked if they murder other people and / or you should be free to murder other persons freely.
Real Programmers don't eat quiche. They eat Twinkies and Szechwan food.