I can't name that place without doxing myself, but it sounds like Netflix has a similar culture. Some people love it. Some people hate it. But I don't think many people would say they have an issue with employing less-than-stellar employees.
Of course this is only "solving" (it's certainly not perfect) the problem of hiring for engineers, which most of us are on HN (at least I assume, but certainly more engineers than engineering managers). It does nothing to address the issue of hiring bad managers. I have no solution for that, other than to make sure the first manager is excellent. A players hire A players because they want to do the best work they can, and will go out of their way to hire people better than themselves. B players hire C players because they just want to make themselves look good. Once you have a bad manager, the assumption is everyone beneath him will be as bad or worse (obviously there are exceptions).