My brother used to work at tech support for XBox Live.
He said that 80% of his calls were for password resets, something users can easily self-service. There's literally an option on the login form for "Forgot Password", and people would rather spend time calling up support, waiting on hold, and verifying their identity to a support agent than click a button.
And it's not like the password reset flow was any easier going through support. He'd just trigger a password reset e-mail to be sent, exactly like the user hitting Forgot Password.
And this is after the phone tree tells them "If you forgot your password, click the Forgot Password link".
I always think about this when people demand they should be able to talk to a human. The overwhelming number of callers to tech support don't need a human. Giving everybody the ability to speak to a human just isn't feasible.
I have an uncle that works tech support for XFinity. Half his calls are resolved by just power cycling the modem/router. People shouldn't need a human to tell them to do that.