Yes, that makes the story more fascinating. They left home during revolution and actually, youngest daughter was still living there alone up until recently (2010-2011 I think).
I think you're reading the story wrong, they even talk about the Bolsheviks killing the guys brother. They would have gone into the wilderness just before WW2, years after the revolution(Based on them being there for 40 years, and being found in 78).
