It's different between coaches and players, so coaches have nothing to do with a person's career as a football player and there are even some great coaches who are not basically football players.
The majority of great coaches are footballers. e.g. Guardiola, Dieogo Simione, Zinedine Zidane, Carlo Anceloti, Jurgen Klop and more.
While those who are not from former players are very few but can be successful because of learning and from assistant coaches, even jose mourinho only started as a translator for a coach.
yes one example of a coach who is not from a former player and a great success yes jose mourinho
I don't think this can be attributed to one another, because many coaches who are also former players cannot become great coaches, but indeed their experience as players can absorb what they learned during their time as players and they can adopt it and apply it when they become coaches.
Jose Mourinho is the most interesting for me, because he started out as a translator and from there he was able to start his coaching career and he is also very extraordinary. I think it's the same as a player, coaches have to have talent or they have to work hard. Because it's not easy to think of something that other people have to implement, and sometimes what the players expect can't be carried out very well.
I don't think it should be a problem, because what we see is not whether they are former players or not, but what we see is what he can show as a coach.