There’s quite a lot of arrogance about foreigners just not being good enough. Turns out smart people are everywhere.
Neither generalization works for ALL cases but hand wavey claims of some ism is small comfort to those of us who've seen the results more than once.
And I've worked with excellent offshored workers as well, but that doesn't make claims to the contrary invalid.
There is also a big difference in mindset between an employee hoping to advance their career at a company, trying to become a SME, pushing initiatives, incentivized by stock grants, actually caring about customers, etc, and a vendor employee - even a good one - to who this is just a temporary gig, and has no vested interest in the quality of the codebase or building value for the company.
If the top down message is "this is the direction, make it work", and people further down in the hierarchy understand that the boss doesn't want to hear that his plan (e.g. hire the cheapest to save money) isn't working, then he is not going to hear it.
that covers more bases