[poiuytrewqa]

Going fast is not the only metric to use to hire someone. To use your example, you might be a great driver that can go 60mph on the snow but you drive the same way when there's traffic on the street, you're basically unaware of the problems you can cause.

This is true in the same way on engineering. Too many kids deploy feature and release it in production without testing or without accounting edge cases that at scale cause massive problem to the user base. While this could not be a problem in a startup it's a big issue in traditional corporation and where error are not an option (you wouldn't consider giving the software of a medical device to somehow who has demonstrates skills but don't know what issues may cause)

Like an African proverb says: If you want go fast, go alone. If you want go far go together