The problem with hiring is that a false positive is much more damaging than a false negative. Getting the group of people together to vet a candidate is expensive; recruiters are expensive; for the candidates, taking the time off is typically pulling from a very limited bucket of just a few weeks every year; flying people in to interview is expensive; and ultimately, to go through all that and hire someone bad makes you go through the whole process again. If it takes you a few months to figure out it's not going to work, it's unlikely anyone desirable from your original candidate pool is still available.

False negatives are expected, and honestly probably good overall and in aggregate, because it decreases the odds of a false positive. One of my first bosses that involved me in the hiring process told me one day that the point of interviewing is not to find reasons to say yes, it's to find a reason to say no.