Not sure where you come up with the idea that one scale is more accurate than another? Maybe you don't mean accurate* at all? Chemists, engineers, physicists (people who regularly need to be accurate with temperature sometimes to 0.001) use either C or K (interchangable). Farmers, cookbooks, and laymen use F; not for its accuracy but because it's "what their pa used".
*If you mean that there are more numbers between freezing and boiling (180 unstead of 100) then that doesn't really mean one measure is more accurate than another. The instrument you use to measure temperature is what will determine the accuracy not the scale. If your thermometer isn't accurate enough to give C to a decimal place, then the F reading you get will have the same error.
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