Ironically, if you'd spell-checked your comment, you would have seen the word you were looking for was "laziness". On the other hand, there's no easy mechanical way of noticing that a small word ("have") was omitted, which is one of the typos for which Zee was being criticized. So what you did is actually lazier than what he did. But I don't look down on you for this typo either. Both your comment and Zee's are pretty easy to understand.

Nobody's perfect. I make mistakes like this all the time, and I'm a professional editor. It's not incompetence — I simply don't have the time to carefully reread, spellcheck and grammar-check everything I write to make sure it's all flawless. And I know many intelligent people who make more mistakes than I do. So when I see somebody get called on a typo, but it's perfectly clear what they were saying in spite of the typo, I find it a bit petty.