I'm not sure if that's true, if you have to travel for some reason and you take the test and are found to not have covid, you obviously don't have any reason to

I'm not sure if that's true, if you have to travel for some reason and you take the test and are found to not have covid, you obviously don't have any reason to fake it. However if you're going to a wedding/see family member/some other trip you value, and you do test positive, you now have quite a good reason to fake it, and if at any point in the past you have a valid test with no QR code on it, could easily modify the date.