Fahrenheit just makes more sense to most of us. 30s = cold, 40s = chilly, 50s = cool, 60s = decent/might need a windbreaker, 70s = nice, 80s = warm, 90s = hot, etc, etc. Celsius is no where near that intuitive and was as arbitrarily defined as Fahrenheit was.
No it makes more sense to Americans (being one of the very few countries left still using Fahrenheit) because they were brought up with it.
How is 30s = cold, 40s = chilly etc any more intuitive than 0-10 = cold, 10-20 = chilly etc?
Thats a ridiculous argument.
People used to using Fahrenheit find Celsius unintuitive.
People used to using Celsius find using Fahrenheit unintuitive.
My parents were brought up using Fahrenheit but the UK switched to celsius in the 70's, they occasionally still give temperatures in Fahrenheit but for the most part use celsius, its not that hard to adapt really.
Considering the rest of the world uses Celsius don't you think it might be sensible for the US to switch too? :P