But the result is a channel that is a very effective means of support when the documentation or wiki doesnt have what you need.
Communication is a game of compromise. Sometimes it makes sense to compromise on clarity or brevity to be nice. But when your goal is to solve difficult, material problems- it can be beneficial to prioritize clarity over all else.
The author mentioned Bezos' grandmother being hurt when he mentioned she smoked away 9 years of her life. Is it really Bezos' manners that hurt her feelings? I would imagine that that realization hits hard and does damage on it's own. I think it would be very hard to get that message hard without it hurting. You can attempt to veil the message and lessen the impact, or distract from it somehow- but now you've impacted the integrity of the message.