Having lived in Boulder CO for several years, which is basically the Mecca of Americanized mindfulness, I can attest that this is true. The most ardent practitioners that I met were invariably self obsessed.
Over the years of living there I became even more intolerant with these people, I came from the Biodynamic Ag side of things so was pretty battle-hardened in the World of 'Becasue woo' to explain most things.
But, Boulder broke me... I realized that most in the US who heard about Steiner's work (I think most of it is BS from a conman) were treading the woke spectrum, affluent or not, but Boulder'ites were simply faking the most ostentatious facade: they would drive their Tesla to and from their mansions yet remain the most rude, stingiest, greedy people I have ever encountered--I'm from SoCal and I'm used to fake and rich people, but even I was stunned by the sheer numbers in just one relatively small town!
But because they practiced 'mindfulness' and had a pocket full of crystals and a yoga mat in tow they were somehow exempt from it all.
The worst were the mindful vegans and vegetarians, I did the most strictest form of renewable and regenerative forms of Ag, and had cooked mainly in historic towns with a long history of farm to table concepts--dating back 100s of years in the case of Italy.
But the absolute trite that left their mouth was stunning, I was incapable of speaking my mind as they were our clientele, but... the way these people speak with such authority about topics hey have no idea about is astonishing: most were professors from CU Boulder reminding you they have a post-doc BA in some unrelated topic, but they all have more in-depth knowledge about the intricacies of Human physiology than people who actually studied health sciences (I have a BSc in Cellular and Molecular Biology, became a Master Grower in Biodynamic Horticulture, and cooked/ran Farm to table concept kitchens and helped grow 75%+ of everything that was on my menu).
Personally speaking, my recent trip will likely be my last: the vapid and rich were always the shot-callers there, but it's with great sorrow that I admit just how shallow that place really is. All of the progress many of us dedicated a lot of our time and effort was undone in less than 3 years!