The dates override settlements that existed IMO. Cave painting happens to this day, word... The Indus valley is far older than this.
You may know this, in which case I misunderstood your point, but this site is a LONG way from the Indus valley.
Mankind has almost always been a house builder, and the marks from their post holes are contemporanous with the famous cave paintings. A gorgeous Anthropologist I was speaking with once pointed out that the first thing a bunch of children off in the woods do is “build a fort”, it is almost instinctive.
The “Cave man” paintings survived because they were in a cave, not because people spent a majority of their time in caves.
So yes, 4,000 years ago there were permanent settlements in that area; but that doesn't preclude them from hanging out occasionally in caves - and painting the walls.