There is essentially no “righteous job” to correct those who don’t seek correcting. There is no “duty towards truth,” for truth is never what we can conceive of. That is just unnecessary validation for the ego by the ego.
The ego is purified through the mirror image of the other; the other is any other ego which it sees itself in.
Therefore, validation from the other can purify the ego the same way as it can trap it. Friendly reaction is a good sign so long as no attachment is made to the ego receiving praise – instead, it should be perceived as an acknowledgement that one is on the right path, and a reminder to tread carefully with each “gift” received.