I had some one email me and the person said that they had taken two voiceover coaching's and understood what was going and wanted to make a voiceover demo. I declined and mentioned they're are lots of recording studios that a person can hire where they can go in and record what they want.
Sometimes there are natural geniuses that can do that and succeed.
More often than not it doesn't work that way. It's important to develop and A-list set of reading skills in order to be able to compete with that large group of very talented voiceover professionals that are out there.
In any profession, successful people are always working on improving their skill level and it should be the same for us. Client loyalty depends on providing the highest level of skill and service possible.