Not true. There are banks and funds that have environmental policies. Where you invest speaks about your character.
What organisations say are their principles and what their actions reveal them to be are often very different.
Even at my own job the CEO claims to be a big environmentalist yet the company is spending huge amounts of money on LLM tokens and the "leadership" team is jetting off around the world for "off-sites" constantly.
Seems to me that the vast majority (I leave off saying "all" simply as I have not surveyed all of them) of these claims are nothing more than greenwashing.
I don't agree. The hypocrisy is from the intent versus the behavior. eg Whaling on the weekends while heading an anti-whaling charity. You can't stop something you're actively working against at the same time. This has nothing to do with capitalism per se, but the qualities of "our economic system".
Capitalism is a foundational philosophy to global economics, to be sure. Systems have bounds that are philosophical (legal is included) and practical. That's where the hypocrisy tends to lie.
People who are environmentalists don't think having an impact on the environment is morally wrong. We have to have some impact on the environment in order to live, and nature can take quite a lot of impact, just not all of it from all of us.
All environmentalists believe there's an acceptable human footprint. How big, varies.
A wealthy environmentalist merely believes they're entitled to a bigger share of the acceptable total human footprint because they can pay for it - and my point, the logic of that is not at all controversial in our society.