You trust strangers all the time.
Do you personally know your current PM/President/Sultan/King/etc.?
Will you vouch for their integrity in a court of law? Would you counter sign a loan for one of them or trust them with direct access to your bank accounts and credit cards. Would you let them babysit your child?
"What if it turns out the leaders are criminal psychopaths manipulating their cohorts to bring about confrontation and destabilisation in society?"
sounds like every world leader/politician I've heard of in the last 50 years