So just flood the zone with shit is what guy 2 is saying.
But if the average person sends out 1000 applications then the average job gets 1000 applications. So they might skim through a tenth of those? But if you randomly make it into the pile of resumes that are seen then your blast everywhere resume probably doesn't get you any further. So I guess we are back to personal connections or industries that are massively expanding, like defense in Europe right now.