Whether someone is all-knowing or not is a relative matter.
In one's own peer group, nobody would expect another person to be all-knowing.
This, however, may well be the case when pretend teachers and uneducated folks like you try to talk to well-educated people but only produce irrelevant rubbish and diatribe in what they are saying and writing.
The rubbish that the ESL market actually is proves itself in post like yours, coming from a pretend teacher....