Or perhaps, people who use the metric system are more able to express their creativity because they aren't concentrating all their effort in remembering obtuse and outdated units.
I thought you would say that, but it's much more difficult teaching people Imperial than it is teaching people metric, especially because not everybody's foot equals 12 inches or even close. Also, what is with the division of inches? They only divide into powers of two, which is useless and arbitrary and doesn't even fit with our money anymore. I mean, does the simplicity of our money system actually make stupid people become bankers and bondsmen? Well, arguably yes, but not more than using pieces of eight or something would.
Really, I still can't remember the whole gallon/cup/whatever system, which, according to you, makes me stupid and not fit for doing science, whereas really, it simply makes me bad at memorizing silly, arbitrary numbers and names. (Unless you've abandoned that argument.
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Where the Imperial system is arbitrary and variable, the metric is clear, concise, and consistent. It uses the same prefixes for everything and they map to each other perfectly when applicable. It uses the decimal system which we use for money, counting, and scientific notation, and which is pretty universal in modern countries, making it easier to teach globally.
Additionally, while the English Imperial terms may be prettier to you, that's not quantitative data and I disagree anyway. There are so many of them it's nigh impossible to know all of them. For example, minims. I had never heard of them without specifically looking things up and I doubt an average American would know what they even are, much less what amount they represent. It's also more difficult for foreigners to learn all these weird phrases from Old English. One only needs to learn a few key prefixes then you're set for life and for all types of measurement with the metric.