I am not following your logic here, much as I am sure whales are valuable to Earth, and I would love to see whales protected, like all creatures including even humans, attempting to express that in terms of carbon capture and money, are stretching things more than a little, it seems to me.
The problem with putting monetary value on things like "carbon capture", is that by doing this, it changes from something originally intended to fix things, to something maintaining things, it becomes a business upon which many people will depend on for a living, so they never want it to stop, therefore the source generation of problematic "Carbon" has to continue, and thus we are further tied into energy by extraction.
Even the term "Carbon" alone applied to atmspheric pollution, is something that looks dodgy - your diagram shows "Atmospheric carbon" being exchanged for oxygen, yet carbon literally is a solid, it does not float in the air, it does not pollute air, it is not even poisonous, but actually a useful valuable element used in production of steel, carbon fibre, and other valuable things.
If you mean carbon dioxide, or even carbon monoxide, you should say so, so that we can tie down what you have presented to any scientific evidence there is that might support or debunk your argument, since you provide no references citing your claims which are unsupported by any first principals scientific / chemical analyses of your own.
Also, if the whale breathes air, then it consumes oxygen, the whale was surely never designed by nature to absorb what is wholly human pollution, produced by burning fossil fuels. Did nature somehow know what humans were going to do with oil?
To me, the only thing we should be looking at monetising, is energy, the only source of which is the sun. That comes with a UBI which many businesses will not like the sound of, because it is substantial, removing the dependence of all employees on continued work for bosses, in business doing all kinds of useless, even harmful things, just to make some money.
I've written lots about this, but it is nowhere near as popular as stories like yours, which maybe appeal to investors, business owners, or those more interested in money, rather than in how to really fix things :)
