[autonomousErwin]

I think I know what you mean, in an ideal world - we wouldn't have bugs. You'd build a feature and it would work forever but that's rarely the case.

I think of it as "offensive" and "defensive" building, ideally you want to be on the offensive (i.e. building stuff that wasn't there yesterday) but you have to balance it with good defence (i.e. adding a certain type of anti-fragility to your system by fixing bugs due to your features being exposed to the real world).

Saying this, I've never met a good engineer who wasn't very good at troubleshooting so perhaps it's more of a consequence of building than a skillset.