[stephensonsco]

The problem is that a founder who hasn't already filled that role themselves doesn't know two things: 1) what the key parts of doing the job are and 2) which skills/personality the hire must possess.

There are many many ways to fail in a position and only a few key parts that matter. The "founder magic" is taking your unique perspective as a domain expert in your business and finding out what the role really needs. You do it by executing in that role for real. After you do that for a while (weeks/months) then you know what will make a candidate successful (and now you have a 50/50 chance of hiring the right person rather than a 10/90).