Think of it this way:
A person goes into a shop, sees "Star Wars" on the shelf (never seen the movie before), and mulls over whether he'd like to purchase it or not for his newly purchased VHS. Then decides to risk it and enjoys the movie.
The same person 30 years later goes into a shop and sees "Star Wars on BluRay" on the shelf and mulls over whether he'd like to purchase it for his newly bought Bluray player. He sees that this particular copy has new-bits which he doesn't want, but he still thinks that he would like to own a better version of the movie, but he wants the original movie in better quality, not the revised version. This he can't have. The person who owns the copyright is not interested in selling him what he wants.
There will always be 2 options: 1) to forego the purchase and make do with the fine films by other people not as insane, or 2) acquire a copy without the help of the copyright owner of the originals.