What is お互い自分の知恵裁量?


A reading passage from practice JLPT test

>
> 人生というものには、いろいろな問題があります。しかし、それらのことも過ぎ去ってみると、あのときに迷わないでやってほんとうによかったな、というような場合が多いのです。そこが大事なところだと思います。ある場合には迷うこともあるでしょう。
> **しかし、しょせん迷ってもお互い自分の知恵裁量というものは、ほんとうは小さいものです。**
> だから、「これはもう仕方がない。ここまでできたのだからこれ以上進んで結果がうまくいかなくても、それは運命だ」と度胸を決めてしまう。そうした場合には、案外、困難だと思っていたことがスムーズにいって、むしろ非常によい結果を生む、ということにもなるのではないかと思うのです。

I have difficulty understanding the meaning of お互い自分の知恵裁量 in the bold
sentence. What お互い means? Does 知恵裁量 mean "discretion of knowledge"?




I believe the author should have written something like this:

> しかし、しょせんいくら迷ったところで、自分の知恵や裁量というものは、ほんとうは小さいものです。
>
> However, no matter how deeply you try to think, your own wisdom and
> discretion is actually small.

  * お互い makes no sense in this context. There is only one person in the first place.
  * There is no such compound or set phrase as 知恵裁量. I think this is just a list of two words which have been somehow joined without any particle.

In reality, you need to deal with half-broken sentences like this, but this
one is unsuitable for a test. If you were confused, it only means your
Japanese is good enough, so you don't have to worry too much about this.




I believe the author should have written something like this:

> しかし、しょせんいくら迷ったところで、自分の知恵や裁量というものは、ほんとうは小さいものです。
>
> However, no matter how deeply you try to think, your own wisdom and
> discretion is actually small.

  * お互い makes no sense in this context. There is only one person in the first place.
  * There is no such compound or set phrase as 知恵裁量. I think this is just a list of two words which have been somehow joined without any particle.

In reality, you need to deal with half-broken sentences like this, but this
one is unsuitable for a test. If you were confused, it only means your
Japanese is good enough, so you don't have to worry too much about this.

