There are definitely examples of shops where you cannot be an employee without being in the union. I worked for a company that was going through a union vote which ended in the vote failing. Part of the conversation was if the vote succeeded would becoming a union member be required to maintain employment. The answer was a solid yes. Luckily, I didn't have to find a new job because of it since the vote failed
You've jumped to a conclusion that was not there to be made. I live in a right to work state. That does not mean the places I was talking about requiring union membership to be an employee are in my state.
