[KennyBlanken]

No, it is not a "required thing." Furthermore, a leader should set an example and be aware of how their stature keeps others from providing feedback to them about their behavior. For example, cops in many departments are taught to work at being exceptionally polite on the road, because they won't get the "you're being an asshole" feedback the rest of us do. Nobody's going to honk at them or curse them out for cutting them off.

"This isn't good enough, your code is sloppy as shit" - you're being an asshole.

"We have a coding standards and conventions round commenting and formatting. I encourage you to rework your patch with that in mind and re-submit it, because at least on cursory examination, your code looks solid."

"Thank you for resubmitting. This is much more in line with what we prefer. Now we'll be able to take advantage of the work you've done to fix this problem."