
You can be truthful AND kind.
But if you're going to be truthful without being kind, at least be honest *about that*. I am quite often not kind. But I'm not going to defend myself by blaming the other person's hurt feelings on "but I'm just being honest!" No, I am trying to make people feel consequences for their actions, so I will say things intended to be *felt* because that's my point.
But when it comes to interpersonal relationships - those connections that I value among people I want to keep in my life such as friends, partners, and family, there is no need to "just be honest". I can be both honest and kind.
That doesn't mean that it will never hurt, even if I'm trying to be kind. It means that I am delivering my honesty with compassion and understanding of the impact of my words and I'm not saying "truth" just to say the truth. I'm taking responsibility for the effect I'm having on the people around me.
Honesty is not a virtue. Courage is a virtue. "Just being honest" is not being courageous. Being compassionate, considerate, and thoughtful is being courageous. Take the Path of Greatest Courage and don't hide behind "just being honest". Honesty, by itself, is not enough.