Just because you have some expertise or the skills to do something doesn't mean you should be arrogant about it.  While ability may mean you can back up your statements of what you can do, conceitedness about one's own skills are never welcomed by others.  Arrogance inhibits collaboration, prevents support from others and leads to the hubris of the fallen.  Instead, take on the attitude of a master, humble in their opinion of their own skills with the mindset of a beginner and the ambition to continue to learn.  This attitude and approach will encourage sharing and concert with others resulting in an even better solution and the accumulation of even more learning for all those involved.

Arrogance is, as it were, a solicitation on the part of one seeking honor from followers, whom he thinks he is entitled to treat with contempt. Immanuel Kant

Arrogance is a roadblock on the highway of wisdom. Anonymous

It was pride that changed angels into devils; it is humility that makes men as angels. St. Augustine