The point is that there isn’t a “right” or “wrong” path.
The 90s 49ers and Cowboys each faced similar decisions. The 49ers stuck with continuity with Seifert while the Cowboys went against it and hired Switzer.
Each won Super Bowls, but the the Cowboys fizzled out quickly, whereas the 49ers remained strong for a couple years until Seifert retired.
Was one right and the other wrong? Or is it more likely that each situation is different and should be taken as such?