Are conflicts acceptable?

  We generally think that harmony is desirable in any organization:
- The atmosphere is friendly, it's more comfortable for employees, there are no direct and open confrontations
- Managers' authority is not challenged, based on the idea that if you have no conflicts, leadership and command are being respected by the teams.
Avoiding conflict is basically positive...Up to a point...
It becomes a real problem when potentially important business issues, tensions or information that could be revealed, raised, debated, actually remain unspoken, silenced, and never subject to discussion ...
Then the corporate culture is one of superficial harmony...
In such a context, who might be willing to raise a hand, ask a question, raise an issue?

The company is paralysed by inertia and routine ....
What are the consequences or costs for the organization?
What critical commercial, operational, strategic, organizational issues remain in silence? And never appear in the light of day?
A somewhat political environment, a rigid management, a misconception confusing leadership with authority can shut people up and silence many ideas or initiatives of interest ... 
Businesses today cannot afford missing new development, improvement or innovation opportunities ...
As an entrepreneur or manager...
Say No to the sterile personal and political conflicts  ....
But say Yes to open debate, promote lively and productive discussions for the good of the company
...Even if they may create conflict!
How do you see it? Do you agree?
How do you handle conflict in your business?