Am I guilty of a felony for not having a license?

Practicing law and the practice of applying legal regulations are quite different, just as practicing science and the practice of applying scientific knowledge are quite different.

Not that MDs are less than scientists. I stand firm that Flat Earthers who do experiments to prove the earth is flat are absolutely practicing scientists! They are complete idiots who don't know anything, but they set out to create experiments to prove or disprove their ideas.

Whereas an excellent physician who is extremely learned and takes medical studies at face value, and knows more knowledge derived from science than most scientists who created it, is only using knowledge derived from science, not practicing science.

It's like during COVID people had those signs "I believe in science!". I probably agree with everything they believe, but science is a process of testings theories and creating knowledge, it's not a body of facts you agree with.