You should always strive to be a generally pleasant person, especially when things get tough.

This not an excuse to lye though. When bad news or a disagreement emerges tell it like it is. Don’t bullshit around it. Don’t sugarcoat it. Be direct, honest, accurate, and objective. If that makes somebody sad then so be it. The best way to cushion a devastating blow is with directness and offers, meaningful offers, of support.

Violating your integrity for kindness exposes you as weak and suggests you struggle with communication skills. You will come across as untrustworthy and unreliable.

I don't disagree. I place "pleasant" near "considerate." You can give bad news or disagree and not be a jerk about it. I think some folks are putting it too close to "make others happy."