Somehow this is my first time hearing about that benefit of Postgres! (despite having googled for explanations of why people were switching to it). Being on HN proves more valuable than google once again...
On a philosophical / meta level it's all quite simple: do your damnedest for the computer to do as much of your work for you as possible, really. Nothing much to it.
Strict technologies slap you hard when you inevitably make a mistake so they do in fact do more of your work for you.
