没‍错，句中的 all 为副词，主要用于加强调语气(used to emphasize how much better something is than it would be in a different situation)，all the 在此表示“更（加）”的意思，后接比较级，句中通常有表示理由、原因的词语如 for, because 等。例如：

I feel all the better for the walk. 走路之后，我感觉更好了。

I feel all the worse for the medicine. 我吃下药之后，觉得更糟了。

The storm became all the more severe. 暴风雨越来越大了。

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