I don't think an assistant should be doing the job of an LVT, such as an LVT shouldn't be doing a doctors job.  We didn't go to school to do their job.  We went to school to learn these skills and I believe most of us our proud to utilize our skills and knowledge every day.  I believe if a student is currently in school and learning (before they are actually licensed then I think that is ok, since they have learned that skill in school.