Nonsense. PCR is used all the time in genetic research, having NOTHING to do with detecting COVID. My daughter used it for characterizing fungi for her PhD. I want it used to show that a grass species we found here is what i think it may be. Etc.
The way it is used for detecting COVID is what is invalid, not the test itself.
How do you differentiate usage from testing? For example, do you consider the swabbing procedure usage, testing, or something else? And likewise in the lab procedures. Honest questions.