I'm sure it is more convenient for a person to right click, compress the collection in a zip, and sharing with a couple/tens/hundreds/thousands of people than to go out to buy those albums or even download it off youtube one at a time.
Not that I really care, but it is what it is... The moment the big record companies say "go ahead, rip the music and share it" is the day their profits plunge from the not so tech savvy people as well as their online sales.
A whole lot of money is dumped in to take down people posting copyrighted music online, there's no reason for them to start allowing people and providing the resources and rights to do so. The people posting copyrighted music on youtube aren't doing it for free, or to share. They're doing it to make a profit in views/ads. (unless it's the record company posting it)
There's a difference between posting on line and copying onto your MP3 player. Most people don't even know how to share their music never mind post it to a torrent site or Usenet. It currently legal for us to make personal copies for personal use, no different than making mix tapes.