People don't tend to react well to feedback from a random internet person, no matter how respectful or well-intended it is. Especially the ones that also don't react well to a minus-one fake internet point from an unidentified user.
I've noticed we often reiterate our own string of thought, but fail to uncover and acknowledge other people's best intentions and perspectives. It is tough to know what is behind short and long strings of online text. Also discussions rarely go well with participants out to convince eachother, while failing to really listen.