I'm glad this calls out the importance of discretion.

I'll say: respect the truth. That doesn't mean a lie should never be uttered, because a lie on one hand can affirm a greater truth on the other hand. (What is said must always be juxtaposed with what isn't said.) Moreover, being kind is not wholly contingent on speaking in some manner of (dis)honesty or (lack of) discretion. Being kind isn't the same as making people happy in the moment.