Really? Just as a litmus test, the last movie I pirated was a 10bit 4k rip of "The Matrix" which comes in at about 40gigs. This is about the level of quality I'm looking for in a file I buy, sorry if I was misleading w/ my mention of DVD. Practically speaking this is similar to having a *.flac of a song, as it enables me to transcode to lower quality versions for use on different devices from a high quality master. Is this something I can pay for?

Yes, you can purchase or rent the physical copy.

Please enlighten me where I can buy a streaming movie that can be watch without login, transferred to another service or transferred to another of my devices.

Movies from Sony, Universal, Disney, WB can be watched through multiple services.

https://moviesanywhere.com