Rann Of Kutch and Ladakh ?
They are the "Least populous regions" of india. Laying tracks and running trains there will cause a Huge Negative Loss for railways.
For Rann of Kutch, village people for there daily needs , they are completely dependent on Bhuj city. So for rail connectivity also , Bhuj can be considered.
Also Dras-Kargil-Leh-Ladakh can use Shrinagar as railhead...
more... for connectivity as already for there daily and survival requirements ,they are dependent on Kashmir capital Shrinagar only. Let once the SVDK-Banihal route be completed , all will be fine of J&K and Ladakh.
And regarding Arunachal, development work is in progress at this moment we talk here. The Railways in Arunachal & Northeastern states has been declared as national projects. So soon in future, Itanagar is possible to be connected with direct railways.
And we should not compare ourselves with China.
Reason: China is a Communist country who has never been ruled under any foreign country , but we India is a Democratic country which has just got independence in 1947. We are hardly 70 years old , whereas China is "uncountable" years older than us.
Just want to share one line which a IRI member had said ,
"To Feel depressed , compare with China, Japan, and all Big Bulls, but to feel proud, compare with others who are behind us..."