I agree that we can't effectively manipulate the environment to eliminate the hazard, but I also worry that we can't effectively strengthen people to make them immune to the hazard either.
A common thread through all human history is people being misled on-mass. Before social media we were slaves to the tabloid headlines. Before widespread papers we were slaves to the pulpit. Etc.
For the last 10 years social media has been the tabloid but personalised. Outrage = engagement so the algorithms have pushed outrage, and personalized in the sense that they have searched for the thing that outrages each of us individually.
I fear that the next 10 years of social media is very basic generative stuff (LLMs don't need to get better; social media companies just have to apply what the current art), turning them into tabloid with intimacy. By turning into your friend in how they communicate with you, they get engagement x10.
The way to change someones mind is through intimacy.
And humans are suckers for it. We can't strengthen the masses against outrage, and we can't strengthen the individual against intimacy.
Sorry for being so pessimistic.