A board of Directors may have insight, oversight, input, decision making ability, influence, etc. but they don't execute. They're not in the trenches doing the work.

If you'll forgive a military analogy:

During World War II, General Dwight D. Eisenhower was the supreme commander of Allied Expeditionary Forces. He had generals in the field, like Omar Bradley, George S. Patton, etc. So you might ask, why do we need generals in the field when we have a general at the head of the Supreme Headquarters Allied Expeditionary Force? Because Eisenhower was primarily responsible for the strategy, planning, and tactics that would be used in the war... but he didn't execute them. That was the job of the field generals (and their troops). Eisenhower and his field generals talked, planned, discussed, collaborated, etc. but ultimately it was the field generals who were responsible for the execution of said plans and strategy.

A board of Directors may have insight, oversight, input, decision making ability, influence, etc. but they don't execute. They're not in the trenches doing the work.

If you'll forgive a military analogy:

During World War II, General Dwight D. Eisenhower was the supreme commander of Allied Expeditionary Forces. He had very capable generals in the field, like Omar Bradley, George S. Patton, etc. 

So you might ask, why do we need generals in the field when we have a general at the head of the Supreme Headquarters Allied Expeditionary Force? Because Eisenhower was primarily responsible for the strategy, planning, and tactics that would be used in the war... but he didn't execute them. That was the job of the field generals (and their troops). Eisenhower and his field generals talked, planned, discussed, collaborated, etc. but ultimately it was the field generals who were responsible for the execution of said plans and strategy.