i am rich
The Silly Collector!
Speaking neutrally, I think it's a couple of reasons.
China has a reputation in the US for producing items of cheap quality, primarily because they're produced a lot of items of cheap quality. But it doesn't mean everything produced in China is cheap quality (a lot of you love your iphones and ipads, right?) and several with insider knowledge have attested that the China plants producing Oaks are as state-of-the-art as anything here in the US.
Second, I think there's a degree of patriotism. When a company moves their manufacturing from the US to offshore, it takes jobs away.
But to get technical, the cracks / paint / corrosion issues you mention really are design flaws, not manufacturing defects. So it doesn't matter where they were produced, as far as those problems go.