The best managers usually played at low levels or not at all, like Hodgson, Atkinson, Mcmenemy, Wenger and Mourinho to name a few.
Just because they were great players like Robson, Don Howe etc desn't make them great managers.
The only worry i have with Cowley is the style of play, i hope he is a manager who can adapt to the tools he is given if you pardon the pun. That's if he comes.
I think i would sooner see him than all the other tired old names we keep hearing of.
If he turns us down then it really is time to worry.
Guardiola, Ferguson, Clough, Robson (Bobby), Beckenbauer, Conte, Capello, Ancelotti, Hiddink, Rijkaard, Cruyff, Zidane, Shankly, Dalglish, Michels, Venables, Keegan, Simeone, Pochettino, Paisley, Pellegrini, Zagallo, Low, Allegri, Zoff, Ramsey, Del Bosque, Lippi, Heynckes, Jacquet, Klopp, Schon, Deschamps, Bearzot, Trapattoni........all played professionally and almost all at the highest level.
Scolari, Mourinho, Benitez, Wenger, Sarri, Parreira, Saachi, Hodgson are outliers rather than the norm when it comes to the better managers.