I think the link between wood burning and cancer is not very well known, which is surprising as it’s boys and men that are most affected. You’d think it would be a political priority.
My best guess is that the govt don’t have a good alternative to push. When the Swedish govt were discouraging wood burning, they were offering grants to switch to clean gas central heating. (And the resulting drop in men’s cancers was noticed as whole towns switched) Now there isn’t any alternative that doesn’t have its inherent problems.
In my area it’s more about a scandi aesthetic and trendy lifestyle choices than poverty. The air quality is awful. So there’s an exodus of cars and SUVs into the hills at the weekend for hikers. 
People who can afford good insulation, sealed wood burners, Xboxes and organised sports, and cars to drive to work in, don’t have to consider the effects on those who walk, cycle and play in their pollution.