I got my AAD from Embry Riddle. Every class I took was related to flying. It made me a better pilot and prepared me for what I thought was going to be my next career in the airlines. It was easy and I knocked it out going to night school for 18 months. I was a better officer because of what I learned from my classmates and the course.
Most of our flying, fighting and winning is done by our steely eyed CGOs and Airmen/NCOs. They probably don't need AAD to be more effective. FGO, command and joint leader requirements are different. If you want to do more than your primary technical job, you need to broaden your education and experience. We do that with AAD, PME, staff and assignments.
Hoop jumpers understand the requirements for promotion defined by Big Blue and taught at many levels. If you don't want to broaden or get AAD/PME done, or accept the value of the hoops, you are in luck. You will most likely be passed over but "continued" and offered the opportunity to keep doing your kick ass job at the same grade without the expectation of more responsibilities. I know many passed over Capts and Majs who continue past 20 doing the technical job they love. Most, but not all, later regret not jumping through hoops and taking the well defined expectations for promotion and advancement seriously. They gambled, lost and regret it.
PME, AAD and broadening aren't that hard to get done. Call it useless box checking or not, if you know the expectations and deliberately self eliminate or at least lessen your chance of being in the top 80% of your year group, don't bitch about it later.
The top 20% of our force in every grade and AFSC are ######ing squared away, dedicated and deserve what they get. It is very competitive at that level and Christmas parties don't mean shit. The bottom 20% are not squared away and for the most part do not deserve to continue service at a higher grade, with different responsibilities and more pay.
Good officers get passed over. Most have a reason. A few just get caught up by mediocre records, bad timing or stronger peers. The system isn't perfect, but it also isn't too complicated.
You can be a leader as a passed over Capt, but you can't be a commander or joint leader without being in the top 20% crowd. Sure, we have plenty of leaders who meet the criteria, are selected by their functional DTs and wing CCs to lead/command but fall short. Some get fired, some squeak through, some kick ass.