However they DO alter peoples perception of said reality and "perception of reality" can absolutely change things. (did you somehow sleep through the last 2 years ?!?)
I stand by what I said. 😉
There's an intermediate step there, though - of actions. Perceptions don't directly change reality, they only do so insofar as they influence actions, and only to the extent that people are actually in a position to act in an efficacious manner. The fetishisation of optimism seems to me to be a potential facilitator of victim-blaming.