Müs wrote:
I don't know how many centimeters I am. Why can't people use goddamn inches and feet?
I recognize that you aren't actually looking for an answer, and are instead ***** about their decision to use meters, I'll provide one anyway.
The meter is the standard unit of length and distance in the scientific community. This includes American scientists. Feet and inches are typically only useful if one is going to use the pound as the unit of force, thereby allowing work to be expressed in foot-pounds. This leaves mass measurements in units of pounds-mass, which is a useless unit as it can't be worked with unless you first convert to slugs. Unfortunately, the pound has little relevance in outer space, without the Earth as a reference, so the advantages that using the familiar unit of force has is overshadowed by the drawback of not being able to do any sort of calculations involving mass without first performing unit conversions.
This is further exacerbated by all electromagnetic units aside from the ampere, which is a base unit (or coulomb, depending on how you're looking at it), being based off of the meter and kilogram. We don't have British Imperial equivalents for the coulomb, ampere, volt, ohm, fahrad, henry, weber, or tesla.
The advantage of the British Imperial system is cultural inertia. It's expensive to switch to the International System of Units. Otherwise, it is an inferior measurement system, and if one were to start over fresh it should not be used.