I've heard these retarded reasons so many times when I lived in England... as if using 2 separate units and fractions was easier than using simple numbers
- is it really easier to say "6 foot 4 and a half" instead of "1.94 metres". guess what? nobody measures height of people in metres. people just say "i'm 194"
- what about ounces and fractions tea/tablespoons? again, retards would claim they don't want to talk in hundreds of mililitres. fine, for larger quantities we use decilitres (2dcl == 200ml == 7oz and the tip of a teaspoon)
- stones and ounces instead of kilos? you're english, nobody apart from children in your vicinity weighs below 20 stones. If they do, they're foreigners and don't understand stones anyway.
- it annoyed the hell out of me when google maps in my phone said "in 1000 feet, turn right". why didn't it just say 12000 inches? makes just as much sense.
I also spent some time in Ireland where they successfully switched to metric. At the time it was quite new and all the road signs were in both miles and km. It was funny listening to builders fixing my house, they measured everything in mm and it sounded just as silly as you are describing - e.g.: the bathroom was 5700mm by 4300mm.