It does not sound like a subtle signal or warning about crossing a threshold, more like a we are already past the point of no return and now we can just sit back and watch as the apocalypse unfolds, first row seats for all recent generations.
okay then why is it taboo to suggest geoengineering interventions like injecting sulfer into the upper atmosphere? The climate advocates don’t have any decisive and ambitious actions that they actually are willing to try.
Because we consistently over estimate our ability to understand the impact of our interventions in complex systems. Look at Cane Toads in Australia or tumbleweed in the US.