Indeed - so there's nothing wrong with buying something through an intermediary (i.e. the cash in the parking lot deal - another free market transaction).
Yes, so there is nothing wrong with Apple deciding they don't want to sell to someone.
Correct. Nobody is a moral villain here, except possibly Apple in a very minor way for refusing to provide a straight answer on their policies.
I would only delete "possibly" from your answer. The lack of any useful answer from the Apple store employee was troubling. The canned corporatespeak does not give a good impression of Apple as a company and the Apple Store as a retail outlet and employer.