There are several good reasons to use an open fire or a wood burner:
- it uses a renewable fuel
- said fuel is carbon neutral if you replant trees
- it also does not have to be piped in from around the globe and so you don't have the environmental costs of transport to factor in, nor are you at the mercy of geopolitical instability
- fires and wood burners are an isolated system; you can still heat your house and warm up water and food if there is a power cut or if the govt decides to introduce rolling blackouts or brownouts.
I would personally never be without an open fire or a wood burner.
I do agree there are risks to them with regards to air quality, but they are not great and are only observable at a population level over many years. The human race has been using fire as a heat source since time immemorial and somehow we have not gone extinct. Maybe when I'm 75 I'll be diagnosed with something caused by the open fires I grew up with as a child, but a) at that point I don't think anyone would care or be able to prove what caused it, b) everyone has to go of something sometime, and c) I'd rather live my life in comfort and warmth than live til I'm 95 freezing my tits off.