I should have clarified that statement as I don't think it's quite correct.

It should read:

I would completely believe that most experimentation being performed currently is not structured to make further exploitation, of the type desired/wished, possible.

There are almost certainly facts available that are not discovered/discussed from past experiments. Many of them are likely trivial and/or not what researchers would wish or hope that their data could tell them. However, they can still be mined.

In any case though, you would still re-run experiments to further validate/reject the hypotheses. That is simply basic science.