The obedience commanded denotes assenting to someone else's directions, and submission means yielding one's contrary opinions in favor of another's. The author of Hebrews does not suggest blind, unquestioning obedience to everything a leader says, even in decisions pertaining to changing jobs, making purchases, taking a trip, and the like. We are called to obey church leadership. We should recognize and cooperate with leadership to make their job easier. We should pray for them continuously and faithfully.
Words of wisdom are sometimes unwelcome.
Just be sure your brain is in gear before your mouth is in motion. As a result of your intervention, the other person will feel good about themselves. Before blurting out any sordid truth, gauge whether your friend is ready to hear it. Ask permission before entering another person's psyche. Ask permission to give feedback and make suggestions.