Enterprise level organizations can use professional voice mail prompts to establish brand and consistency. Smaller organizations and even one person firms can represent themselves as a professional and established organization that understands how to present themselves to the business world and their potential client base.
These issues limit the quality of the recording because the amateur actor doesn’t know how to speak with the proper enunciation and cadence for phone system recordings, and there’s no experienced director handy to provide guidance.

Voice mail allows business professionals access to messages -- even when they're away from the office. A call to any business or home used to mean one of three things -- an answer, a busy signal or endless, unanswered ringing. Increasingly, it now means an encounter with voice mail.
Using your cell phone to record a voicemail message isn't always easy. Between remembering what to say and getting the right timing, it's tricky. But your phone does have a playback option, and it's easy to listen to and review your message. For some people, though, cutting off the end of a message is a funny way to trick people and catch them off guard. In most situations, callers won't know it's intentional and will think you're far less than tech savvy. Definitely not an impression I'd want to make.