The entire concept of "lived experience" is, bluntly - absolute bullshit. You take all the worst aspects of both conscious and unconscious biases as well as anecdotal 'evidence', and wrap it up in the fact that the average person is simply not capable of objectively analyzing themselves[0], and you end up with people saying that demonstrably false things are true simply because that's how they [incorrectly] interpreted their "lived experience," or how their "lived experience" supports their decisions. This last part is particularly true with politics and nutrition, where people make decisions not based on objective data but based mostly on how they were raised and what they like.

I can spend decades eating junk food and lose weight as long as I work out long enough and hard enough. My "lived experience" tells me that junk food is fine simply because it hasn't killed me yet.

[0] 80-90% of people describe themselves as an "above-average" driver.