I've been recently thinking along similar lines about libraries. In web dev, it's common practice when you have a problem to first look for a library that solves it for you.

I get the "don't reinvent the wheel" sentiment but, I think we take it too far sometimes. I've been looking at the source code for some dependencies at work lately, and many of them actually don't hold up to our own code quality standards. Kind of subjective, yes, but many of our dependencies would probably fail code review if actually reviewed by us.

Then when there is a bug in a dependency, nobody actually understands how it works and the code is often tucked away and not easily changed.