The monks taught Danny nothing about Alphas, Betas, and Omegas. Maybe no one ever presented in their realm or maybe Danny was unknowingly taking suppressants. Either way, he's never had a heat and no one has taught him anything beyond what he'd learned before the crash. He has no idea what a heat coming on feels like. Or how much a heat can affect his chi. The Alpha Defenders need to get Danny through his first ever heat, which will be a difficult one since it was suppressed for so long, and then cram years worth of teachings into the time between Danny's next heat.