The problem is externalities. Companies have to be held responsible for their damage.

If governments held companies liable for the full cost of fixing their damage to humanity and earth I honestly don't know how many would be left.

"Green capitalism" only exists if green energy is more profitable than climate-harming alternatives

Given the multiple decades of oil and gas infrastructure, that's not realistic.

In theory, consumer demand for green energy could make this a reality, but it would have to be a massive swing. And in practice, most consumers will go for the cheapest option - in many cases, given their resources, they have to.

The other way that green energy could become more profitable is through heavy government regulation. So... yeah you could have a green 'capitalism' if the State manages the market, and withstands the corporate pressure to withdraw. But that has literally happened nowhere

I suppose hypothetically you could argue that IF a company invested heavily in green technology and IF that investment resulted in a cheaper form of energy, AND that technology also applied to the supply chain, then we could have green capitalism. But i mean that's highly speculative and it also would be entirely a coincidence