So you don't mind having DRM imposed on your files.... Going through 5+ useless previews of other films etc when you buy a DVD.... Having rootkits installed on your machine as so said 'security' measures...
You must be studying for IP lawyer, otherwise i would question your intelligence and advise you to find something else and stop studying.
Like the good old days of VHS tapes, you never heard of a ff button. On modern media DVD or Blu-ray movies the menu key is a button press away
I don't watch movies on my Mac, it's nice to have the option since Apple provides a rather nice DVD player with OS X. On the PC side of things, I compared the Microsoft supplied DVD player with Vista Ultimate and it was a mess.
Not only do you pay a huge price premium back in the day for an OS with a DVD playback solution on the PC, it just wasn't very well made. On the other hand, you didn't need to install the supplied DVD software included on many DVD movies to boot. Back on the Mac side of things, Apple was kind enough to pay for the licence so the end user of every Mac with a DVD player never had a problem.
In the end, I've never had any issue with root kits when using the DVD player app on any Mac I've ever owned.
Digital distro is way of the future lest we like it or not. Music CD shelves are shrinking as are the video rental stores and even retail sale shelf space as well.
One trend I've noticed was the inclusion of a digital version of many Blu-ray films for retail sale. The DRM on those files doesn't bother me as it never really gets in the way of using said content.