I can’t tell if you’re serious — medical assistants take vitals and a basic history all the time. Do they not count? What OP described is basically this, and what I’ve described about my own shadowing experiences is exactly that. Vital signs, chief complaint, HPI, PMH, Meds, Allergies, OPQRSTI etc. then present the patient and give my (admittedly very basic at the time) differential and plan. Other settings (non-primary care) were less conducive to this for time constraints, but it was certainly not unethical, harmful, or in any way beyond the ability of a competent premed. I don’t feel it’s productive to raise the alarm because you are not personally comfortable with what OP did, because their experience is not at all out of the ordinary.
I don’t appreciate the attitude either. At least take the MCAT before you condescend to someone with >7 years of clinical experience about what it’s like to work with patients.