Trusting someone for being the real Satoshi might mean unknowingly allowing a big change that may end up to be the death of Bitcoin as we know it.
Not necessarily. Trusting CSW, for example, to be the real Satoshi does not make any change at all. Neither does trusting Dorian Nakamoto to be the real Satoshi cause the death of Bitcoin. Neither does trusting anybody else allow a big change in the Bitcoin universe.
That big change will only take place if the real Satoshi shows any sign of activity.