I agree. If it's open source, surely I can at least "compile" it myself. If the data is missing, I can't do that.

We'll end up with like 5 versions of the same "open source" model, all performing differently because they're all built with their own dataset. And yet, none of those will be considered a fork lol?

I don't know what the obsession is either. If you don't want to give others permission to use and modify everything that was used to build the program, why are you wanting to trick me in thinking you are, and still calling it open source?