Because it requires a core assumption of anti-intellectualism.
It doesn't bother you when friends and family are sold on something that is baseless and are completely opposed to actually researching it and at the very least becoming more skeptical about it?
Nah. We evolved to be superstitious. It's evolutionarily advantageous. Why? Because it's much less costly to develop a random incorrect superstition than it is to miss an important correlation.
How harmful is it to meditate to 432Hz compared to... well maybe without that superstition they wouldn't even meditate at all. It's probably advantageous, even though it's bullshit.
As long as they aren't engaging in harmful behaviors (e.g. anti-vax), best to let it go.
Sorry for the late response, but correcting someone often has social costs. It takes time and energy, and can cause people discomfort and can weaken friendships.
It can also make them stronger, I'm not proposing you always ignore superstitions. Just ignore them when there's a cost and minimal payoff.
It doesn't bother you when friends and family are sold on something that is baseless and are completely opposed to actually researching it and at the very least becoming more skeptical about it?