I'll agree that many people use "agile" as an excuse to skip handling errors correctly, and the end result of that attitude is very little error handling code,

I'll agree that many people use "agile" as an excuse to skip handling errors correctly, and the end result of that attitude is very little error handling code, but I've never seen a robustly designed project that wasn't mostly error handling somewhere. The real trick is if the language gives you the ability to abstract over it in some way so that you can make the handling ergonomic in some way.