Are there 95 US themes? There's only the 3.1 pack that has 75 themes.
Japan exclusive themes like Monster Hunter 4G looks very nice.
You asked why would someone want to change their region, I gave you an answer. Don't overreact by acting like a kid.
Edit: There's already work being done, region changing should be coming soon.
http://gbatemp.net/threads/poc-3ds-region-changing-proof.378110/