P2P film piracy, at least for the quality-minded, has a few strong competitive advantages over film streaming. It doesn't have to deal with rights issues, for one, which can present huge roadblocks to film distribution. Films are also huge files and the interests of a streaming platform (low bitrate) are in tension with interests of quality. Even in comparison to physical media--the highest quality release of a film might be from a different market than yours, or there might be many competing releases over time. There might be different factors that are better in one release and other factors better in another release, where the pirated copy can combine all the best parts. It's actually somewhat remarkable how good film piracy has gotten these days for those who care.
The library for the music streaming platforms is much bigger than for films, of course (about 250 million for Spotify), but there's also a much lower barrier of entry. So perhaps the higher work needed to produce a film necessitates more profit, to a degree that only the fragmented streaming platforms can fulfill. After all, netflix started making originals to counter studios launching their own streaming platforms to raise profit margins, and pulling their content off netflix.
They might not care but anyone who literally can't tell the difference of a good 4K source and a 1080p source on an appropriate display needs to go see an eye doctor. But that most people don't care about quality also isn't particularly shocking.
And as gp indicated, quality isn't just about the encode resolution and bitrate but also about the master itself. Unfortunately not all directors and companies behind great movies have the resepect for their creations that it deserves and the current release which might be the only release on streaming platforms might have significant flaws such as unwanted cuts/restorations, missing audio tracks, replaced sound effects, inaudible mixes, missing subtitles, bad upscales, excessive denoising, reframing from the original aspect ratio that cuts of content and/or shows parts of the originally captured film frames that were never meant to be seen, or various other "enhancements".
Music being generally 3-10 minutes long while film is 1h30-3h makes a big difference here. A film is a bit more of a commitment than a playlist entry; you can just put music on the virtual sushi belt and grab what comes past, while sitting down for a film is more of a time commitment.
Right now, there are too many film distributors and services, let alone TV, plus a lot of exclusives that people want to watch. These video streaming services seem to be trending towards consolidation, but I think film distributors remain diverse.