But surely the principle of doing experimentation is not well understood by anyone.You seem to think that nobody understands how to do experiments.
That's plainly wrong.
You can not demonstrate reliably any further phenomenon behaviour if your experimental devices itself use the phenomenon you want to study.
OK, say you want to do an experiment to find out about tigers.
According to you, you can't include a tiger in my experiment because that would be "the phenomenon you want to study."