Very true, to an extent.
But the importer does have a "due diligence" aspect. The factories, at whatever competency level and where ever they may be, will simply build what the customer wants.
As an example, Importer A says "This is what I want, and I want it as cheap as possible".
Importer B says "Here are our specifications; what is the price that you can build this for us?".
Importer A gets the stuff in as quickly as they can and simply blows it out. They look to cut corners at every stage, and their only real concern is that the product will make it through the warranty period.
Importer B negotiates more, requires samples, and tests the product themselves for function and fit as well as having component things tested, like metal composition and strength. This method costs more in time and money. And this type of importer will typically have their own specifications which call for better-than-minimum materials. They usually have a better warranty, too.
Buying an Importer A product gets you a cheap price. On the other hand, you'll pay more from an Importer B product, but you'll get much more value for your money, because it will be a better product. And it will also be very competitively priced within the market, due to the simple reality that off-shore manufacturing is less expensive.
I saw this first hand years ago, with electronics manufacturing in Asian factories. Off-shore manufacturing is not necessarily a bad thing, but only if it is done right.