My guess is the onmyoji organization has a lot of enemies and can't afford to add to them.I love how he's treated with respect and these people not trying to kidnapped him and experiment him on something shady. I read the Heroes Return and most of the returners treated like trash, a burden, etc, no wonder they crashed out.
That, and the culture surrounding gods and land spirits are different than western norms, methinks. There, anomalies are superheroes or lab experiments but in the east (place vs place, japan ahh glaze) supernatural phenomena are to be entreated with, supplicated for blessings and appeased to avert disastersMy guess is the onmyoji organization has a lot of enemies and can't afford to add to them.