Job interviews are awkward as hell.
You're supposed to sell yourself without seeming fake, show off your sparkling personality without saying too much, and somehow pick an outfit that looks competent but not overqualified. It's a headache all around, and it's not much easier for those doing the interviews.
While hiring managers don't have the vulnerability of vying for employement, they have the struggle of sorting through dozens of applicants, organizing the logistics for interviews, and trying to scope out who is good for the job and who is just putting on an act. And conversely, they have to decipher those who are unfit for the workplace from qualified applicants who just have a case of the nerves.
Luckily, amidst all of the stress and bore, there are some job interviews that travel so far down the rabbithole they're entertaining again.