I suspect actual concern for the few isolated people and many sheep is low.

What could be the real reasons for such a military and economic investment?

1) Economic (aka oil)?
2) Strategic, from a location and military perspective
3) National pride and stubborness

( "French Insolence and British Stubbornness."
In his last address to the troops of the Somme the Kaiser adjures them to stand firm against "French insolence and British stubbornness.")
:)