The higher level organization required for an effort like this isn’t comprehensible to me. Like you say, hiring a single person is hard enough... how do you get it right ten thousand times over? This is mission critical stuff, too.

Honest question - do companies tend to over hire in scenarios like this, then design with loads to distribute well so if say... 25% of hires don’t work well, the job can still be done? Is that absurd?