I don't think that's true, about low priced tickets. What you actually mean is that once companies collude to create a situation where it's virtually impossible to compare one flight to another, or one airline to another, by any criteria other than cost then cost is what drives customer decisions.
I'm sick to death of this meme that Americans are only interested in low prices. The fact is airlines were one of the first of many industries to use fees, line by line cost breakdown, obscure deals and a baffling purchase process to strand customers on an island of price comparison and nothing else. See also: cell phones plans.
If you knew what you were getting and could hold airlines accountable when they didn't deliver on what was purchased I promise you price would no longer be the only factor. This is not a truism about Americans you've found, it's a truism about distorted and manipulated markets lacking sufficient regulation.