"Should a servant of the Lord therefore feed His sheep or mock them for wandering away?
You are assuming anyone is one of His sheep. Not a good assumption. Some are goats.
You are assuming that this command is the only command in scripture. Not a good assumption.
We urge you, brethren, admonish the unruly, encourage the fainthearted, help the weak, be patient with everyone. I Thess 5:14 - different strokes for different folks.
You should also look at Jesus' own words about those who distort God's Word, the Bible...
“Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men’s bones, and of all uncleanness. Even so ye also outwardly appear righteous unto men, but within ye are full of hypocrisy and iniquity.” — Matthew 23:27, 28
So, the scriptures don’t apply to me if they don’t specifically mention me? What about the woman caught in adultery to whom the Lord said “Go and sin no more?” There’s no message there for those who read the Bible? When the Lord gave His Sermon on the Mount, he was addressing the people of His time and not us? Or the youth who asked what he had to do to follow the Lord and the Lord told him to sell all he had and give the money to the poor, that has no meaning for anyone other than that specific person?