This comment, taken as a response to the parent or just as general advice about life, is so entirely bereft of anything objectionable, and is so intrinsically reasonable that its status as 'downvoted' (assumed from the grey text color) is a blemish on HN's commentariat.
Put more simply: it takes a weird, broken logic to find fault in the idea that a person who won't stop emailing you, after being told to, isn't "combative".