It's like asking why consumers go for low prices rather than good quality. Similar answer: Because it's easy for companies to hide poor quality, but impossible to hide high prices. (Although companies do their best to hide prices anyway, like airlines charging everything as an addon).
In many domains, higher prices fail to deliver better quality. You just pay more.
People learn to optimize for less anger over being cheated: it doesn't work well, but you didn't pay much. If you had paid more, you would (probably) be equally dissatisfied, but also feel like you got suckered.
