[carapace]

I don't think you correct the parent so much as come at the question from a different viewpoint and context.

If you are trying to avoid B.S. as a newbie professional programmer then the parent advice is, in my opinion, very apt (and "narrow-minded" only to a degree that feels well-focused.)

On the other hand, if you are a beginner and hoping to really learn the art, as well as the trade, then your comments eatonphil are most apt as well.

For example, knowing what I know now, I would never try to design and implement my own language (except for fun), but I know what I know now in part because I've done so in the past. ;-)