I don’t have the time to learn “every” sefer that my rebbeim hold of, because my priority is to learn shas and poskim; would i pick up a sefer written by a gadol who i know nothing about? Sure! I’ve xone that at shul sometimes… something I’ll look at bein gavra legavra, or stam when I’m in a new beis medrash and curious about what seforim they have.
But i don’t need to read seforim written by people i don’t hold of; not just the Lubavitcher rebbe… There’s a pretty long list of people who write seforim who i have no interest in.