You really want a kid-friendly educational show to go around advocating ecoterrorism? But you think that "it cannot be stated how harmful such a mentality is" as to suggest with oodles of cautions and warnings that we should research geoengineering? (This is an "off the wall" idea, but you also say they're the ones who lack imagination....)

The atmosphere doesn't care particularly where the CO2 comes from because the residence time in the atmosphere is long compared to the mixing time. So "net zero" isn't a "highly corporatized framing" but actually a physical necessity. Unless we do compensatory geoengineering.

It is true that Kurzgesagt does not embrace the same political philosophy that you do. But you seem too irritated by this to make consistent or sensible arguments against them.