It doesn't matter how precise the value is, as long as it's precise enough for your use-case and as long as machines are handling it. If the value is displayed

It doesn't matter how precise the value is, as long as it's precise enough for your use-case and as long as machines are handling it. If the value is displayed in a UI and it's rounded off to a reasonable decimal there, I don't see the point why you would get so worked up about it. I'm sure my thermostat internal temperature representation is way more precise than the 0.5 degrees precision it's showing on the display.