Mindfulness meditation is probably useless [0]. Other forms of meditation are obvious scams [1]. It's possible that there are some particular forms of meditation which are actually scientifically valid, but a huge portion of the field suffers from psuedoscience.

I think it's pretty likely meditation is placebo and conditioning. People like mysticism that comes from the East. Acupuncture is the same deal.

Amusing to note the "Weaknesses in historic meditation and mindfulness research" section on the link you posted.

[0] https://theness.com/neurologicablog/index.php/mindfulness-no... [1] https://theness.com/neurologicablog/index.php/transcendental...

Here is a link explaining that a lot of meditation studies are funded by those starting the cult (e.g. Transcendental Meditation, which involves mumbling random gibberish taught to you by a "master"):

https://www.healthnewsreview.org/2016/06/conflicts-of-intere...