> good ideas that don't make market sense

I think this is incorrect framing. You have to shape the market, not the idea.

Capitalism’s fault is not accounting for externalized costs, like climate change.

The market allocates resources very effectively, but the costs the market uses to allocate resources are lies. They omit costs that producers can ignore or otherwise avoid paying for.

If these externalities were captured and embedded into the price of the good/service, the market could actually account these issues.