I have experienced this in regard to sewing machines. I can afford to buy a more expensive machine, but they are intimidating to me and frankly-I hardly use most of the functions on my more expensive machines (the most expensive cost less than $800). I was considering buying the machine you have and think it is a great value for the money. I am sorry you had to experience this persons attitude. I hope the class was worth the price and that the instructor was nice.
Pat