Or you're hunting in circumstances where you need to shoot multiple targets rapidly, often repeatedly. Wild hogs, for instance. It's entirely normal to fire >10 rounds at one go. The point isn't that you need round #30. It's that you need round #11.
Also, circumstances requiring more than 6 shots are not rare. Let's dial it up to 10, just to make your case easier, shall we? How often do you need more than 10 rounds? According to the NYPD metrics on "shots fired" incidents, about 15% of the time. And those folks are cops, with decent amounts of training.
Of course, if you prefer to ignore data in favor of penis anecdotes, I'm *sure* that's a completely valid point.