If I have bought and paid for the DVD or Blu-Ray, I will share it with whoever I like and there is nothing you or anyone can do about it, as I own the film.
Wrong you purchased a license to play the DVD or Blu-Ray disc on your player or pc, the license does not include uploading the content on the disc to the internet, you may back-up or lend your copy of the disc to a friend, you may not sell copies of the disc to other people.
With a digital file that would be Copyright theft if you uploaded the file to the internet then you still have your copy, and anyone else who wants it can make a copy as well.
Films cost too much or I don’t have a job and I only buy movies after watching them.
At the most extreme you are saying film makers should produce a film and give everyone a copy for free, do you see how that does not work?
Why would anyone produce a movie or any other creative work that cost money without making that back, in the real world not all movies are made in Hollywood and have budgets of millions of dollars/pounds, independent film makers live without backing from studios and work for a living and may never see a profit.
This is theft, the only thing is that people have a distorted view of the world that all digital copies doesn’t count, it’s still the same as bootlegging, the film makers see no profits only the people violating.
By downloading and not buying new films and other media you condemn the world to films like SAW 8 and Hostal 4, and the music of Justin Bieber, Rebecca Black and Lady GaGa.