He really does not come off well in those comments. Repeatedly saying I am successful, therefore what I am doing is right.
In his defense, it sounds like he has mostly worked by himself. Some practices don't have a very good ROI when you are just hacking away by yourself. I would argue that unit testing is one of them, if you are not very experienced with it anyways.
It sounds to me like he got beaten up in his own comments section. The people commenting don't seem to realize that he is talking about a different type of programming than the commenters are doing.
In his defense, it sounds like he has mostly worked by himself. Some practices don't have a very good ROI when you are just hacking away by yourself. I would argue that unit testing is one of them, if you are not very experienced with it anyways.