I had to look up the article to figure out if this was the intolerable downside of having kids (all this work raising them, and then they just fly out of the nest) or _not_ having them (with your scientific work the only great project of your life). I believe he meant the latter :)
I don't think people choose Python because it's virtues as a language for tooling (it's not great from that perspective, statically linked binaries would be better). They choose it because of the ecosystem of libraries. For data analysis, visualization, and scientific computing, there are no comparable offerings in any other language. And a lot of this is stuff you _really_ don't want to be reimplementing from scratch, because it's very easy to introduce bugs (around numerical stability, say) that cause your software to produce correct results 99% of the time, and plausibly-looking but totally incorrect ones 1% of the time.