“Some schools, like dzogchen, a tibetan buddhist school, teach to change nothing in the mind. Why invest? States and phenomena arising are all impermanent and cannot be maintained.”
You are a missing point that those people indulge in sexuality, alcoholic drinks and does not even understand Dhamma. Dzgochen teaching makes no sense so the tibetan buddhist which worships hindu gods. You just seeing one small part of them which have no relation to Buddha Dhamma but it only seems like that.