There is nothing inherently evil about committee letters (which are basically required as part of med school applications).
The issue is that some schools pre-health advising departments will prepare a committee letter for ALL students who want to apply to med school, while some schools will only write the committee letter for students they believe are the strongest med school applicants…thereby acting as gatekeepers and another weed-out point. For some students, how an undergrad school handles committee letters is an important determining factor in their matriculation decision.