Aikido-as-art has ...elements that fit nicely into the total package when trained and integrated appropriately.
You probably know this- The Kidotai (those black armored Tokyo riot police) agree- They are required to complete the famously grueling, year long Yoshinkan boot camp before they get their button. And nobody thinks they're not ready for duty.
Civilian students at Hombu that get the nod from Kancho can enter the Senshusei course, too. That's like letting civilians into Navy Seal training!