[formulaT]

Netflix engineers are better than the average engineer (even in a given job title), so the prevailing wage calculations don't represent the true economics.

But in any case, H1-B visas can lower the wages of engineers without H1-B holders earning less than Americans. It's just like any import. The import itself doesn't have to be sold for cheaper, it's just that the presence of the import lowers the price via competition, so that both the import and the local good are cheaper than the price before importing started.