Henry mate
In any case, I would suggest in broad terms that a professional pilot is one whose livelihood is dependent to some degree on flying aeroplanes for a living (and maintaining the required licenses and qualifications relevant to that employment).
Close; but that only means that he is legally entitled to get paid for exercising the privileges of his license, it doesn't necessarily mean that he is "professional".
I'm sure that there are both types in all organisations.
Recognising which is who is the trick.
As Greenslade was wont to observe, "it's all in the mind you know!"