cis and trans aren't subjective those. they mean "this side of" and "across/opposite from". those are their definitions. that's literally it.
https://docs.google.com/document/d/e/2PACX-1vRBMzu61nY0pBey8fuXLS8vfjAPYr30SpfeyMn527e86ZPwJMJ8pWeLmfbhgeJOAcNR0RzkmPAjr-eR/pub