Recently I approached a software project with the idea that I'd like to employ a fuzzer later when possible. What I found particularly interesting is that as soon as I had this idea in my head, my mind would constantly think of the code in a defensive "I-need-to-account-for-any-input" way.

Not just thinking about making the code work in the desired way, but also that any other input is walled of.

I think fuzzers are something that should get more attention, because it doesn't just help find critical bugs, it also changes your mind-set to defensive programming.