I see where you are coming from with regards to not having a playing career, it is an interesting discussion point as to what makes a good manager. do you want someone who's career is "purpose-built" as a manager who knows all about the technicalities and tactics or football, or one who is an experienced professional who may not have as extensive understanding of the game, but can relate to the players in terms of what they may be feeling and how to manage their mental state.
I reckon, like most things, the sweet spot is somewhere in the middle of these two extremes however, I do think a more important factor for a manager is how flexible they are and how willing they are to adapt their tactics to keep up to the changes and advancements in the way the game is played as well as notice their faults and work on improving them.
I think AVB has what it takes and, despite his work in the game to date, he is still very young for a man in his position and for that reason he will make mistakes as shown by what happened at Chelsea, which can somewhat be put down to his poor man management at the time (grossly exacerbated by the divas in the Chelsea dressing room though). The Friedel/Lloris situation last year was handled smoothly (despite what the papers wanted you to believe) and he has also become a lot more friendly with the media and seems to understand how to work them a bit better (something which he clearly did not know how to do at Chelsea).
In case you hadn't figured it out, all in all I'm very happy with him (and I don't even hate Redknapp
)