There's something satisfying about trading labor directly for something like heat that you normally have to buy. Exercise is good for you, sustainability and resilience are virtues, and so on.

But heating even a modest space with wood is a Lot of Work.

Also, it's still quite energetically inefficient, but that's a technicality here I feel, energy isn't completely fungible (it does salvage my sentence, which was about energy). The carbon accounting would be interesting to spitball but fiendishly hard to do fairly.