Seems like it’s on BMD to add PRR compatibilty to Resolve, not Apple. Meanwhile, I work exclusively in DaVinci Resolve Studio with ProRes RAW HQ converted to ProRes 4444.
For me, assigning blame to either company doesn't solve any problems. Over the years I've bought too many pieces of gear or too many workflows with the expectation that promised features, firmware or fixes would arrive. Sometimes I've been lucky, and other times have ended up with expensive doorstops. Now I wait until I see that it actually works for me. I've also shot jobs where the client mandated a specific recording format or camera - only to be contacted by the postproduction supervisors later, after they'd discovered that their edit system wouldn't accept the format they requested. While that may be 'on them' it quickly became my problem to fix (for no additional fees) if I ever expected to work with them again. That's how I learned how important it is to successfully test the workflow in advance, and failing that have everything recorded simultaneously (on a separate recorder) in a format that I know all the major editing systems could accommodate.
I'm glad the ProResRAW workflow works for you. I don't know how much footage you tend to shoot (many of my recent shoots have been multicam 3-4 cameras, each shooting 2-3 hours of footage a day) - but just think about how much easier and quicker your workflow would be if resolve accepted it natively and you didn't need to convert the footage before editing.