Why doesn't it? There are plenty of instances where bad safety practices with high energy have led to injuries. In fact, the parent comment had more information relevant to the discussion than yours did. By your measure, your comment brought absolutely nothing to the discussion, and you would have been better to simply ignore the comment you didn't like. Policing what people say in that manner is subjective and tends to lean more towards your personal dislike for the comment than for any stringent criteria of quality. All that said, I like tofu too. Maybe we can find a tofu discussion on HN to carry on in.
It bugs me that so many posts on HN immediately get shot down with "It's not safe", which is not constructive at all.
(see: self driving cars, drone delivery, etc.)
Just saying "it's not safe" is not useful, and I suppose I wish people would do it less. Yes, safety is a consideration for sure, so a comment that talks at length about how to make it safer is useful. Simply saying it's not safe is not constructive.