And distance is based on the circumference of the Earth.
When you say you are so many meters tall.
You are saying: I am so and so fraction of the circumference of the Earth.
Which doesn't make sense.
Foot.
Lie down. Let me see how many steps of my foot will reach from head to toe.
The metric system does not make sense.
It makes sense in a Star Trek way.
It does not make sense in an Earth way.
It is based on water.
When you say you weigh a number of kilograms, what you are actually saying is that you weigh so many drops of water.
That does't make sense.
English. Stones. You would use stones as a counter-weight to a person.