This advice falls under the principle of mutual encouragement toward truth, patience, cooperation in piety and righteousness. It is not a reproachment. Although

Reproachment, when done properly, benefits relationships, whether between a person and their child, neighbour, or brother. There is no harm in that. I reiterate: if you believe you are benefitting here, remain with calmness and tranquility...with full liberty, as long as it is within the bounds of obedience to Allah, His Book, and the Sunnah of His Messenger. He is thanked and may Allāh reward him. I thank such a person, make du'a for him and praise, and they too likewise. We are brothers in faith. And whoever sees themselves above these matters or feels they gain no benefit here, I implore them not to burden themselves with worries, harm themselves, or cause divisions. Do not forsake your brothers, nor should they forsake you. Instead, express your intent to leave, whether to another place of study or to teach your brothers elsewhere. Whether in Yemen or abroad, you remain honoured and respected. Whoever harms you, harms all of us! Go ahead. May Allāh bless you all."