The creation of mass delusions that benefit powerful groups is basically the norm in human society it seems like. It used to be religion and now it's fact-free feel good wishful thinking. My lived experience. My truth. It's no different than dancing to please the sun god.
Somebody's “lived experience” is their personal anecdotes. It's often in contrast with “quantify or discard”-type bad-at-science academics who make blanket assertions about things they don't know very much about.