Below is just an example:
I am from India and I remember that we were promised by our PM, Narendra Modi, that he would bring all the black money from Swiss banks and he will deposit around 15 lac INR into every Indian citizen's account.
Like this, he made a lot of promises. He said "good days will come" in 2014 and most of these promises are have not yet been fulfilled, but still most of the people are highly impressed by him.
I know that he is a good orator, but what I don't know is, what is the weakness of "Being impressed and convinced and remain the same over the time" is called? And why sometimes the realization takes time to come?