It's more than just a file format.

The issue is that companies want control of the demosaicing stage, and the container format is part of that strategy.

If a file format is a corporate proprietary one, then there's no expectation that they should provide services that do not directly benefit them, or that expose internal corporate trade secrets, in service to an open format.

If they have their own format, then they don't have to lose any sleep over stuff that doesn't interest or benefit them.

By definition, a RAW container contains sensor data, and nothing more. Are you saying that Adobe is using their proprietary algorithms to render proprietary RAW formats in Lightroom?

pretty sure they would lose a lot of sleep if no third party application could open their raw