I can't be bothered reading that study but it's fucking obvious that isolation exercises are a very useful tool.
It's very simple.
Compound movements pretty much all work in the vertical plane (i.e. against gravity) and that just doesn't cover all the muscles as equally as we need when we apply it to sports. Hamstrings and calves are some obvious muscle that you can't activate sufficiently with just a barbell.
Clean and press would if you have decent form. But I agree probably varies by muscle