I asked my 1800-rated table tennis student why he wasn’t attacking his (2100-rated) opponent’s half-long serve. My student responded by saying that because his opponent was rated 2100, he assumed that all his serves were short.
I asked my 1200-rated student why he kept hitting to his (600-rated) opponent’s backhand. My student responded by saying that his assumed that all low-rated table tennis players have weak backhands.
I asked my 1700-rated student why he kept trying to smash every ball against his (2300-rated) opponent. My student responded by saying that he assumed that he probably couldn’t return any balls anyway and decided just to go for high-risk shots in the table tennis match.
These hypothetical situations demonstrate that you can’t assume a certain set of skills is used by certain player levels in table tennis. You must approach each opponent individually instead of categorizing players by rating.