It makes complete sense: people submit patches as "proof of concept", to show that a fix is possible, and how to go about it. It's not laziness or lack of abili

It makes complete sense: people submit patches as "proof of concept", to show that a fix is possible, and how to go about it. It's not laziness or lack of ability, it's just that there's no need to handle exceptional cases in a proof of concept. Needless to say, when you're actually patching the code, then you start worrying about the details, so it makes complete sense.