Josh31 — “Historically, one of the reasons we do not wear tefilin during the day (except during davening) is because of fraudsters.” Could someone clarify what exactly this means?
There are a number of individuals who wear tefillin both at Shachris and at Mincha regularly. Sources say that the Gr”a wore Tefillin throughout the day. The Shaar HaKavanot of Rav Chaim Vital documents the practice of his teacher (the Ariza”l) wearing Shimusha Rabba at Mincha.
It might be more precise to say that we do not posess clarity of thought and purity of body to wear Tefillin beyond a limited time each day.