If the thing that drives your quality of life is subsistence farming then your quality of life is terrible.

No human except monks would choose such a life.

Maybe, maybe not. The point is that the GDP of the country you're in going up or down is a somewhat abstract and irrelevant concern for a subsistence farmer

I think it's possible that some of them have beautiful lives anyway, but tough, no doubt. I've been to some similar villages in Ladakh