Agreed, but let’s look at the standardization-process from a practical point of view. Currently roughly 50% of the world-population is using Celcius and the other 50% Fahrenheit. One group will have to be persuaded to use the other groups convention. You will be hard pressed to convince these people.
However when you would go for something none of the group is using (scientists being a very small population of either group), nobody would have to change sides. It will sell better…
“The U.S. is the only nation that continues to use Fahrenheit temperatures for shelter-level (surface) weather observations. However, as of July 1996 all surface temperature observations in National Weather Service METAR/TAF reports are now transmitted in degrees Celsius.
All upper-air (non-surface) temperatures have always been measured and reported in degrees Celsius by all countries.”