No, there's not really a universe in which the high speed lines to Urumqi or Lhasa really make any (financial) sense. They literally do not sell enough tickets to pay to energize the wires.
Again, you're still doing what I said you shouldn't do. Compare those to highways to nowhere in the United States, or to many northern roafs in Canada. They are not used nearly enough to justify paying for their maintenance either, but we understand their necessity so that everyone is connected.