>>25357
You say there is no good place to roam in eurasia during winter, but what you say is too tedious in eurasia. So having a good summer place was sufficient as they werent so overly populated.

You don't need lush green fields for 4 seasons to nomad around in eurasia.

>>25363
Because livestyles change, because it's good place to settle down after fucking up their neigbours. Because you may eventually overpopulated and need to settle down. Because as khan you are not in charge of fucking everything and certain tribes decide to migrate.
Because nomads don't nomad for lulz, it's merely adaptation for their geography and won't likely to insist nomad around a place that is good place to settle down.

Assuming it wasnt rhetoric of course.