Your quite correct, but it's a case of "You get what you pay for". and I'm quite aware that you ridicule , the high cost of the better products, Some of which carry a life time warranty. That's why they cost what they cost.
Unfortunately the cheap / budget products are churned out by the thousand, every day. As for the components, as you should know there is a discount for buying multiples. So if you order by the millions, it brings the cost right down The average production cost of your average AVR, is less then 50 dollars per unit.