First of all, because of this crazy situation with the new AAMC policy and COVID-19 I don’t think any school would hold it against anybody for foregoing their waitlist position in order to boost their application, take a break, and reapply.
This rumor that if you don’t get in don’t apply again is not true for every school, and if you got interviewed, that means the school likes you and will probably give you a very honest assessment on what you could do differently for the upcoming year—just ask. Again, if you’re finding yourself getting a lot of interviews but not acceptances, maybe do things that work on your personality and likableness, instead of your medical and science side
Maybe spearhead a volunteer group, Create a YouTube channel or website for mentoring high school or undergraduate students, or work in a rural or an inner city hospital, or do something inspirational that you can talk about with fire in an interview and that puts meaning into your practice as a doctor.