.and homeowners want their equipment to NOT run, and they want to use crazy setback, expecting 4 minute recovery, there are a litany of corrupting influences leading to bad design decisions.
Hvac guys can't afford to educate homeowners (or even their salespeople), or put up with non revenue generating complaints on really hot days. It's feast then famine, hay needs to be made while the sun shines. The homeowner bears ultimate responsibility for shortcuts when low price is king and diagnostics and design are cut out of the process.
Spread the word and maybe things can change.