You're right! That's, um, the, uh, problem.
"People north of 40 are schizophrenic about voice mail," says Michael Schrage.
Bullshit. I'm old and I hate voice mail. No one knows how to leave a message and they're just going to follow up with an email or come see you in person anyway.
If you're just going to leave a message that says "call me back" then send an email or a text or an IM. Or use the scheduling function in email to set up an appointment with me.
The worst offender was a manager I worked with some years ago. He would do the stream-of-consciousness thing whenever he got voicemail and you'd end up with 10 sentences covering 10 different topics. Which I would then turn into 10 different email messages and send back to him.
It's communication! It is NOT the same as talking. Just because you're talking does NOT mean you're communicating.