Quick Answer
A low AAMC PREview score may matter more at a school that requires PREview or recommends that applicants submit it. At a requiring school, the AAMC participation category says the school may not consider an application complete until a score has been received. At a recommending school, applicants may submit with or without a PREview score, but the score may still become part of the file if submitted.
That does not mean a low score automatically blocks admission. PREview is designed to complement academic metrics such as MCAT and GPA, not replace them. Schools that use the exam are getting another data point about how you reason through professionalism, communication, teamwork, accountability, empathy, ethical responsibility, resilience, and related competencies.
Before reacting, confirm whether the schools on your list require PREview, recommend it, accept it to satisfy a situational judgment test requirement, are exploring it for future use, or are not participating. The best next reads are Schools That Require PREview and Schools That Recommend PREview.