Learning how to observe emotions arise and react more reasonably and rationally is valuable. You seem to have a personal grudge or possibly just don't know anything about the subject.

It is not because it does not even claim to be science. The often associated religious or/and esoteric part is something, putting me off for years (it still does). But the thing itself has a quite rational essence. Helpful for me:

https://www.amazon.com/Mindfulness-Plain-English-Revised-Exp...

At the end it comes also to dukkha and other Buddhist concepts I don't care much about. But before, it served me very well in his quite accessible approach to what I would call 'mind cleansing'.

On-topic: In my opinion the whole thing is nothing for very young people, in particular not for children.

Yup. It isn't even one defined thing. And in the sense that it barely is definable it's no different from placebo. Probably because it is placebo: have an authoritive source tell people if they think some way it'll make them feel better.

Totally agree. It's a strange consultant money grab that has managed to gain stream. It appears to be useful for people with anxiety issues, but is being touted as a cure all by snake oil salesmen all over the place. It's like the astrology crowd has a new toy and revenue source.