It is important for SOMEBODY to decide, but it is of no importance for YOU or ME to decide.
Whether Bergoglio is Pope or not makes absolutely no difference in my life. My knowledge of, and practice of, the Catholic Faith are absolutely unaffected by his bloviations.
Is it not sinful to disobey a Pope’s teaching?
Is it not sinful for a Catholic to say he doesn’t care what the Pope has to say?
If so than what you just said cannot be true.