Because with or without GPS, it isn't accurate enough to know if you were in the store or drove past it from 20 feet away. Not to mention to get credit card or phone tracking data, those providers would require a court order. This shirt isn't that complicated and the government doesn't give enough of a shirt what gavinj from SaintsReport does to bother tracking your movement under normal circumstances.
I repeat: THIS IS FOR HOSPITALS. NOT THE GOVERNMENT. STOP BEING PARANOID. YOU ARE NOT THAT IMPORTANT.