I watched it without sound but, WOW!!!, you are absolutely correct! This demo must have been done by people who don't quilt. Are you going to leave a comment? You definitely should! (Or I will.)
Actually, the way she is using the end of the ruler, it looks like the entire ruler was designed incorrectly for cutting bias strips. What's wrong with June Tailor??? Unless maybe they expect the quilter to cut each strip at the fold and piece the strips together again -- which is completely unnecessary if you cut the bias strips correctly to begin with.......