The only problem you can get is, if a person doesn't believe their putting stroke is bad and just assumes they are miss reading putts. This is were Aim point can help as well. If they know aim point is right, and they use it correctly, and they are still missing putts, then a beginner can learn their putting stroke is bad. Also a lot of people will adapt. If consciously they know they are reading right, they will develop feel and make more putts overall. If you couple this with getting a consistent putting stroke, then that's were a putting weakness becomes a strength. But reading putts has little to do with putting stroke, its just most amateurs would rather blame a miss putt on a miss read than a putting stroke.
For me on Saturday, with Erik reading some of my putts, i knew the line was good. But I could feel that some of the putts i hit the ball on the heel of the putter, and a couple others i just didn't start the ball correctly. One putt I did start right and hit it good, i drained a long putt for birdie. So accepting that miss hitting the putt is more of a problem than miss reading will help people learn what needs to be improved.