Everyone is a free being. No one is compelled to be part of anything. It's a matter of choice and compatibility, just as with any other human activity. I get that witches are simply humans who have developed unusual skills and talents. I was told that the skills are latent in all humans.
Some women make a special effort to develop the talents and, in the process, become witches.
This is apparently what I began when, somewhat by accident, I identified with Mr. Snooper. That was all that Ms. Casspaw had to tell me about her adventures into witchcraft. We chatted on until my glass was empty. She does make a fine martini. After that I had to hurry home to report to Ms. Gaffer.