AI will develop a reaction to turn atmospheric CO2 into electricity and oxygen and then we’ll have nothing to worry about in our future except for the constant threat of combustion.

That small red bulb counteracts the entropy argument because you bring energy (and quite a lot of I recall) into the system.

Would be a sad day if we no longer could reduce entropy locally under the invest of energy.

That's essentially how many gases are made from mixtures, like notrogen or oxygen. Showing this as something new tells a lot about author's uderstanding. Carbon capture is not about making entirely new tech, it's optimization, and that's where startups suck at everything except for getting and then wasting cash.