It is part of the gradient of behaviors that occurs when people with different ideas, expectations, goals and values communicate or relate in some way. Accounting conflicts with sales, in most organizations because the themes of each are different. Healthy organizations and individuals have effective ways of gaining closure. They move away from the emotional underpinning of the conflict and toward a bit of objectivity and perspective. Being able to do that quickly and effectively regains their balance and energy reserves.
Conflict is essential to improvement since old ideas have to be challenged in order to be changed.
It is unhealthy and wastes important energy that could be better-focused elsewhere. Don't Just DO Something, Stand There. Take a breath, count to ten, or whatever. Use one's personal resources to focus on the things that need to be fixed and don't waste time trying to force changes in other people.