Cultish figures like Peterson thrive on keeping their audience mired in lack of self worth and low esteem. Their messages of self blame aren't conducive to personal growth because they maintain doubt and judgement, of self and others. This keeps their followers in a sort of paranoiac flow. Cult behaviour is just widespread now.
To privileged people like Hunnam, I would imagine Peterson's message fills a void and then later renewed his narcissistic ego. It's sort of like how Tom Cruise is psychologically affirmed by scientology, because he is rich and advanced in the hierarchy, compared to the lowly follower who is held captive through lack of self worth. The rich unintelligent follower is affirmed because the message, usually nonsense, justifies what they already think of themselves - that they're awesome. For the lowborne unintelligent follower, the message keeps them caught in that parasitic state where instead of affirming a sense of ego fulfilment, it keeps them always questioning themselves - but beyond healthy parameters. It's like a constant self analysis, which is dampening instead of enhancing.
Positive self growth comes from exploring and discovering through others and learning from and adapting to them. This is why the likes of Peterson mold their message the way they do, because they don't want their followers to actually engage with longer term positive personal growth. Messianic figures aren't what leads to becoming a better person and really aren't necessary in the long run.