Think about the difference between success in the military versus success in a small business. In the Army, a protocol faux pas or a single ill-considered statement can implode your career path. Understanding of and adherence to the rules is job 1.
In a startup mode, you can ignore conventions/rules, because those things are often not relevant to a tiny company. That doesn't mean that you have carte blanche to rob a liquor store -- but it does mean that you don't need approval from a VP to fill out a 4 page expense report to buy a bottle of booze for a client.