There are also "legitimate" reasons to fail first round interviews, such as the recruiter picking your resume for a role that you are not actually qualified for (which the hiring manager notices after the interview), your salary expectations being too high for that specific company size/geography/role (usually a communications mismatch where they advertise a more senior role than they actually have), or it coming out that you are not legally allowed to work for them (they cannot sponsor visas; they don't hire in your country; they require citizenship; etc).

All these cases are technically the company's fault, not the candidate's, but they do often come out right after the screening call.