I think this is a argument to nowhere....
Some chairman choose good managers, some don't as they sack their own appointees!
On the face of it, Chairmen especially many new ones probably have little or no experience in football, football management, coaching or appointing people into those positions, so their knowledge is no one better/worse than the average punter - which they were a few weeks prior to becoming chairmen!
Many chairmen have experience is making executive appointments but football wise knowledge may be limited.
In reality its all pretty irrelevant as Chairman you pay the wages you get to make the decisions, simple as ....
Fans live with those decisions, or decide otherwise.