Unsustainable doesn't mean "Great thunberg is sad". It means our way of life stops, with an iron certainty. What tf do you think rising food prices are? They are a crisis of not enough resource. Using less of one resource (gas for fertilizer) necessarily means more of another (land). Same for housing. Same for electricity. There's not enough of anything.
The more "reasonable" people fail to acknowledge that, the more likely your midnight scenario ACTUALLY HAPPENS, because the people who will acknowledge it aren't reasonable, they're looking for targets, and History is just as certain they'll find some. Pretty much every European country has seen a big alt-right swing, and blaming Twitter for that is weak.
Economists need to acknowledge reality, magic beans will not always save us. We escaped once, by burning a hundred million years' of resource in one hundred and eating 70% of the land area of the planet on the way. There is no planet B.