I agree with you!!!!
It all depends on the country you are resident in.
The USA has it own 'Inches' , 'Feet', 'Gallons', miles' etc., they are slightly different from the old imperial weight and measures.
In the European Community (EC) as a result of the French Revolution(1789) everything is metric. ,'Centimetres', grammes', etc.,
In Great Britain we orignially had the Imperial Weight and Measures system, 'pounds(lbs)', 'Miles', 'pints'. etc.,
However on joining the 'EU' in 1974 ,we tried to convert everything to metric. However, there was resistance to change , and so we ended up with a complete mess in our weights and measures system. Whereby, beer is sold in 'pints' , but 'petrol/gasoline' is sold in litres. We also changed our currency from 'pounds, shillings and pence (L.s.d) to a metric system of pounds and pence (L.p.) to be in line with Europe. However, when the 'Euro' was created , there was resistance on changing from the 'pounds' (L.p). to Euros. So we do not trade in 'Euros' , but pounds.
With respect to temperature, UK was originally, Fahrenheit, after the German physicist giving 0oF as the lowest temperature he could reach. The metric system degrees C deemed 0oC to be the freezing point of water.