If Kompany can win all the average clubs and lose to Leverkusen and Leipzig, I think he will be able to win the league this season but I don't think that everything will go tossy for him like he expected. In the long run he would be face d with challenges when he has injured players. Kompany have started the season well by winning his matches but that doesn't mean that he has the ability to win the league because I see Leverkusen as a big challenge to him.
The ideal conditions of a strong team are always difficult, but it is not impossible that weak clubs will be easy to beat. This means that predictively, a strong team may lose points, but it can also happen when playing against a weak team. In addition, the long and dense competition allows them to live up to what you call "injury": It's too early to say Munich are league champions this season. But if Munich is one of the candidates for the league title this season I agree.
Don't focus too much on some strong teams that can beat them, because sometimes a team that is considered weak and predicted to lose can actually make a surprise. Luck is usually something that speaks volumes in this case, we have seen many matches whose results are determined by luck.
Bayern Munich has all the needs for them to win the Bundesliga and they have shown that they can even maintain it for more than a decade before Leverkusen showed a very good game last season and finally broke Bayern Munich's dominance and recorded the championship title after 120 years they could not get it.
Now it's still early and I will not be too early to predict who will be the champion, because in the standings there is no clear construction.