I think because the impression we given to people …so they always except more from us
I feel like expectation is sort of a driving force that pushes us to become better versions of ourselves.
I think you meant, why do others have so many expectations. Or was it self?
If it was the former, then I think we all are tuned to expect something from someone if we do something for others. its crazy…its just the way its tuned or wired…Should we meet those expectations or not, is always up to us…