Abakan Range is rather difficult place to live which is why they where left alone and the family was not from a culture of nomads. Yet, Agafia made it to 70 and is still alive.

That suggests it's far more viable than you might think. It's just more attractive places to live currently have people living there. Opportunity's for solitude where far greater when global population was lower, but it's unlikely for such things to enter written history.