No, you said whoever came up with the idea was a moron of epic proportions. And your explanation as to why was directly due to the arbitrariness of the prime meridian.

In geospatial terms, anything to the west of the prime meridian has a longitudinal coordinate of n°W, where 0°<n<180°. Anything east of the prime meridian is likewise n°E. Hence, eastern and western hemispheres.

Yes, the western hemisphere is to the east of Fiji. No, that doesn't change anything.

I shouldn't have to break it down into such basic terms for such a smartypants as you, so hopefully this doesn't come as an insult to your intelligence.