Does An Alumni Reaching Out For An Interview Mean Anything?

My DD has her alumni interview with Harvard tomorrow. She only applied as she had an unused fee waiver. No way she qualifies, although it’s a dream school. We were sorta weirded out when she got the email about an interview soI looked at CC Harvard pages. It seems they try to interview everyone but usually only get through 80-90%, depending upon where they have alumni willing to do it, as another poster said. Unfortunately it means nothing that she is being interviewed & yes, it does not count against you if you cannot be. I feel it’s a bit of a waste of time for her & the interviewer but she really wants to do it so we are.