Because for the knowledge I have and for the things I can do people feel the need to give me money and there for I must accept it and hence like all other professions I become a member of such said group, in this case HVAC; HVAC professional.
Plus because I wonder why when I see a piece of HVAC equipment it wasnt made as good as it could have been or made to the best of an individuals or groups abilities so I must put forth that very effort to suceed where others fail.
(adjective) 1 a : of, relating to, or characteristic of a profession; b : engaged in one of the learned professions; c (1) : characterized by or conforming to the technical or ethical standards of a profession; (2) : exhibiting a courteous, conscientious, and generally businesslike manner in the workplace; 2 a : participating for gain or livelihood in an activity or field of endeavor often engaged in by amateurs <a professional golfer>; b : having a particular profession as a permanent career <a professional soldier>; c : engaged in by persons receiving financial return < professional football>; 3 : following a line of conduct as though it were a profession
"The critic is a prisoner to his own experiences and perspectives, erroneously believing his limited experiences are the sum of all truth". T.D. Jakes