Easier said than done, but the sooner you can adopt a nihilist view of the AF "system," the better.
Allow me to wax poetic as an old guy for a minute. I don't mean unprofessionalism towards our craft. I don't mean disrespect for your wingman. I don't even mean insubordination. If you want a masters, great. Get it. If you don't want it, don't get it. The AF might kick you out as a passed over Major at 20 years. Ok. Your check of the month will be $600 less and the gate guard might not salute you quite as crisply when you go to the commissary during retiree hour. Or don't wait around to find out and get out at 12 years. I'd encourage you to go to the ARC, but if you don't want to, don't. If the AF is a lifelong calling for you, great. If it's just a job for your 20s, great. The system doesn't care which camp you're in - it'll be just fine without you and you'll be just fine without it.
Your work ethic, intelligence, and expectation of success puts you heads and shoulders above your workplace competition. Unless you go looking for that hot girl Molly, you won't end up homeless on the streets of Portland. If you're panicking about your promotion opportunities with this new bait and switch, I encourage you to go create a LinkedIn account. Seriously. Go look at who's doing ok in the world. Find and follow the people that you think have made it. Masters or not. Promotion or not. You'll be ok.