As discussed...

BIAB is a musical tool. The effectiveness of it will be subject to the sensibilities and musical understanding of the person using it. MZ gets a very good result. The guy in the EZB video would get a very good result. A rough strummer or somebody who doesn't play anything and just clicks on "The Melodist" and starts singing will get a disjointed result.

The gist for you...
It's a hell of a tool as of right now and getting better all the time. You should learn to use it and then ride with the upgrades. You would be glad that you did.