No, the reason is they are basically lazy
All my machine lead screws and dials are "English". I don't need to spend more money just to change to that other system.
There are a lot more drill sizes in the English system than the metric. More is usually better.
Who's lazy?
I know and can relate to metric and standard, but I find metric to be less than suited for daily issues, just as measuring liquid in tenths or hundredths of a gallon would be of little value.
I can replace "keg" with "100-150 liter containers", but people are going to say 100 is too small and 150 is too heavy. You could go fractional and go with 130 liters, and people will still refer to that useful volume container as a "keg", which will have more meaning to them than 130 liters.