It isn't a bad ballpark though. And is good for showing improvements from generation to generation in the same product line and OS. Some super accurate thing, across all platforms? No, not really. But it is still useful, and the data is valid provided you keep the shortcomings in mind.The validity of Geekbench as a cross platform benchmark for me goes out the toilet when the simple act of switching to Linux gains you thousands of GB score on Ryzen. Seriously go to the database and search 2700X by highest score. Everything Linux as far as the eye can see. And MacOS on Hackintosh machines sometimes, before you see Windows.
The OS and compiler play such a huge role you cannot use it as a valid comparison for architectures. It's only a valid comparison for the entire chain of software and hardware that get it running.