No problem at all, Jack. I heartily agree... the large price difference would cause anyone to "wonder" about quality issues. That is an eminently rational and intelligent reaction. But, there is a difference between "wondering" about it....and deciding, within the channels of one's own mind, that there MUST be a quality difference - usually based only on preconceived notions, or prejudice (and not supported by any facts, or specialized knowledge). Hence my efforts to dispel the myth.
Asking the question, as you did, was simply the intelligent thing to do....if one doesn't know, it's wise to try and find out.

It really can be brought down to a simple principle, I think - keeping an open mind, until one has enough facts in hand to be able to arrive at an informed conclusion. That can be tough, as good information is not always easily obtainable....but it starts with thinking things through - and not allowing our personal "foibles" to colour our judgement.