I think Bayern Munich management has its own arguments regarding the decision to choose Kompany as coach. I think what you say is also true, perhaps the Munich management is analyzing whether a young coach with a modern football philosophy will be easier and able to bring the team back to achieving its mission. Moreover, Kompany also has a strong leadership character and he also has almost the same style as Pep Guardiola so that might be another reason to consider.
Of course, Bayern Munich will never choose Kompany if they have no strong reason. It can be about the style of Kompany in managing a team, or it is about the personality of Kompany. But it is very doubtful if Bayern management chooses him because of his achievement as a manager. There are too many other coaches/managers who have a better achievement than Kompany.
Regarding the characteristic of strong leadership, I think each manager/coach has that characteristic. There is nothing special about it, it is just a common matter. However, if a coach has a charismatic impression, it can be something special. Not every coach/manager has it, it is only owned by few coaches such as Zidane, Pep Guardiola, Sir Alex Ferguson, and Ancelotti. It is too early if we assume Kompany has the nature like those coaches.