1. When you put the onus on the individual, powerful organisations will jump at the opportunity to absolve themselves of blame. Look at recycling and how it was pushed by the plastics lobby or the idea of a “personal carbon footprint” that was pushed by oil companies. There is a fact that these are systemic problems, that require systemic solutions.
2. History doesn’t repeat itself but it often rhymes. Which massive threat to human life has been solved through bottom-up grass roots action (I.e. not protest to drive systemic change)? Look at small pox, the ozone and cfcs, covid, lead pipes, asbestos, etc. these all required huge top down programmes to deliver results.