Highlander Innovations - Sealed Drive gearing enduro

Hears my sealed drive enduro bike that currently has 40- 12 cassette with 32 tooth chain ring, I have been running it for 2 months with no maintenance needed that includes riding Dudes of Hazzard enduro on it, it has been jet washed but did not need to be relubed
So why is it that sealed drive bikes don't exist?, except for this one