The way I see this is really simple: As with any other high priced-high quality brand, I think I am entitled to get the best product. If I buy something because the MA talked me into it and then I go home and don´t like it, I expect that when I return it, I will be treated with the same respect and joy as when they were selling me the product (and I do treat people with respect).
Even if the MA didn´t help me, if I just went to the counter/store and bought something, I should feel confident that I can return it if I don´t like it later (after all, they tell me I have 30 days to return it) and I will be treated okay.
Why should I feel bad, or the MA has to make me feel terrible, when for my part I have to go all the way back to the store to return it, spending time that I probably don´t have? The job is not only to sell, but to satisfy the customer, leave us so happy we will gladly return to the store many more times in the future. I can understand they made a mistake on recommending a product, but I cannot accept bad attitudes.
In my experience I´ve never returned products, I´ve exchanged the ones I don´t like. Once I was treated super cool, the other not so great (I bought a brush, the 209, the MA put it on the bag --I didn´t check it on the store. When I got home, I saw it was all stained in the metal part, terrible. I ran back to the store --spending time I did not have-- and the lady just looked at me as if I´ve done something to the brush. I was so shocked. I´ve been buying my brushes online since then).
But yes, I completely understand the MA´s being angry with customer who go around the minimum purchase rule, that´s just plain cheating and stealing.