For me, it's more than just the dangers of their ideas. Its mechanisms of control. Can members come and go freely? Do the members have a livelihood separate from the religious community? Do they have access to other perspective or is their information limited and curated? Do they use their doctrines to create obedience to the leadership? Is their financial obligation to the movement more onerous than other religious groups? Can a member leave tomorrow without being stalked or harassed?

As far as I’ve seen, Falun Gong practitioners generally live normal, secular lives and aren't financially 'captured' by the organization. They might have strange or even 'subversive' views, but if the mechanism of total control isn't there, 'NRM' remains the more precise academic fit.

This is not a defense of their views. If our net is just fringe ideas, the net would be cast too wide and catch otherwise socially accepted groups.