I'm sure I could write a basic HTTP client implementation for the current needs of my project in an afternoon. That doesn't mean that I shouldn't be using libcu

I'm sure I could write a basic HTTP client implementation for the current needs of my project in an afternoon. That doesn't mean that I shouldn't be using libcurl or whatever instead, though. It's perfectly reasonable to conclude "my need is a subset of a larger but well-defined task for which there's a bunch of mature, proven and widely available libraries – I should leverage them".