You often don't know which work was "10x" except in retrospect, so this advice is a little like recommending people only invest in the stocks that are going to go up.
As Seymour Cray said, "The trouble with programmers is that you can never tell what a programmer is doing until it's too late."
It can be months (at a high salary) before you really know whether a hire is likely to work out. I think it makes sense to invest more effort in screening applicants in this case.
https://archive.org/details/Hexaflexagons