Pass the popcorn, this one's gettin' interestin'.
If I knew nothing about heat load calcs, psychometrics, dehumidication, or equipment sizing (placing me among most homeowners), I would side with Bama over Eddy simply by way of attitude.
The difference in attitude is... one guy I will have to go behind and clean up his messes. The other guy I won't have to.
I've spent a good portion of my working life cleaning up other people's messes. Had their attitude been different, so would have how I spent my time.
I would rather excel in having done something right, and to enjoy the benefit of other's good work, than to expend my breath mopping up because someone was either not sufficiently motivated, or overly arrogant, to see the need for an attitude adjustment.
Bottom line...we want the public to have more respect for the HVAC industry? Then this attidude of "it ain't rocket science" has gotta go. Sure, it's not ROCKET science, but it is THERMODYNAMIC science. Why would anyone think that's any less significant?
Psychrometrics: the very foundation of HVAC. A comfort troubleshooter's best friend.