mc misread the time and thought he was late so he ran as fast as possible to
school even though he had plenty of time. His friend makes fun of his frantic
behavior as he entered

> まだ本鈴まで５分あるんだから、なにもそんなになるまで全力で走らんでも、良かったんじゃないのか？

there's still 5 min before the bell rings, even if you run with all your might
like that... that was a waste of effort wasn't it(?)

logically "... was a waste of effort" makes sense, but what is actually
written is more like "that's good isn't it? How does なにも at the start fit in
with this?

Thanks
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2019-06-25T17:50:46.450
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question
adverbs
なにも....良かったんじゃないのか？ in this sentence