I wonder why so many instructions say to PRESS the binding in half when that step makes the over-all process more wonky.
But then - almost all binding instructions assume one is planning to use a binding that finishes at 1/4 inch.
An aside - just because one is taught one way to do something - that is no guarantee that is the only and/or best way to do something. However, old habits are hard to break and/or change.