It's "funny" that people see his statement, that perhaps it's better he didn't die as an infant because he's done some good, as arrogant. He could be paraphrased as saying something like "I've experienced such misery that sometimes I wish I wasn't here at all but on the other hand I think I've done more good than harm for others and there is some comfort in that." How that's arrogant is beyond me. I can understand people having the opinion that, no, he's done more harm than good - but he's not arrogant for thinking otherwise.