You are so right - the main excitement of a gangbang is the ability of another hard cock to go deep into the lady as the previous feller shoots his load and pulls out: multiply that up by six of more and the bitch is up on the ceiling and higher for a long long time.
Taking turns has it's advantages. Ensures that there is another hard cock on deck when one finishes inside the lady. Some ladies when they cum that fist time they wanna keep cummin, ya know?
I have to agree with you to wholeheartedly as I have seen my wife submit to her boyfriend, and he definitely took it vantage of her and gave her the orgasms and deserves.