Indeed.
> Are you confusing the term with just 'anyone who works for a living'? That's not what 'professional' means.
That's how it's commonly used in sports, perhaps that's where I got it from. I'd call any athlete who performs their sport for a living "professional", not because they are e.g. part of a specific league, but exactly because they can do it for a living.
But regardless: which people in a typical company would be the professionals? People with protected titles (Lawyers, etc)? How do e.g. Engineers fit in?