In general, a business that is run by committee is less likely to go off and do stupid things. A business run by committee is more likely to think a potential action over very carefully and avoid doing something in a hurry without figuring out for sure whether it is a good idea. Committees cause many voices to be heard and many ideas to be considered.
However, businesses that are fun by committee can be very slow on their feet. They can miss opportunities because of a lack of strong leadership. They can also lack focus for the same reason.