Jr Modem Engineer: Hey Steve, what should we do if their Internet is out and they want an https cert that we are unable to find?
Sr Modem Engineer: Well, Frank, glad you asked! We'll just quietly substitute it with this random janky self-signed certificate for the modem itself instead, I'm sure that'll solve everything!
Jr: But won't that just obscure the real problem and overwhelm the user with a bunch of unnecessary and incorrect error messages?