The same reason Imperial is better than Metric for most places where Imperial is better than Metric:
Imperial has more sensible base units and is generally easier to intuit*. Metric has more sensible divisions and is easier to do calculations with*.
*assumes equivalent levels of familiarity
So for most applications where you're only using one unit at one scale, Imperial is better. Most applications where you're calculating using several units or shifting between scales, Metric is better. (No one uses Metric for time though, when you're usually doing both, so it's not a completely hard and fast rule).
Since comparing temperatures generally found on earth with other temperatures found on earth uses one unit and one scale, Imperial is generally better.
Of course all of that is broadly irrelevant because very few places teach both, so having both in game is obvious better because a lot of people only know one or the other.
Maybe I don't understand that, but Celsius works great for all temperatures: 0 is water freezing, quite important for everyday use, 37 is standard human temperature, 43 is dead human temperature, 100 is boiling water (again, quite useful), 3600ish is melting Tungsten.
The base unit of a 30,54 cm "foot" is quite unintuitive, as feet rarely are that large. One degree Fahrenheit is also something that isn't inherently better than a fraction of Celsius. Or a useful distinction to make in the first place.
I feel that once you've gone through the trouble of the Fahrenheit system, it's hard to go Celsius, but for temperatures encountered on earth, Celsius is awesome, trust me