Sugarcoating tends to be a euphemism for being rude though. This tends to evoke an emotional response back and down we go. Even if it's not a euphemism there is a big advantage imo. It's an efficient way to rein in your own emotions because it forces you to write a thoughtful response, this leads to a higher chance of getting a thoughtful response back. I think sugarcoating posts is a borderline necessary requirement to have any meaningful discussion.