And combined with the statements from this poor guy about not being able to block out intrusive thoughts ... people with clinical depression or schizophrenia need to be careful not to practice dissociating instead of meditating. Especially beginners who may think the point is to "keep pushing thoughts away and think of nothing". Mindfulness meditation is pretty different, and it's the one most of the promising research is concerned with.
That said, I like more dissociative types of meditation as well, it can be fun to try and get calm and focused enough to approach no thoughts at all. It taught me how to cure my insomnia for one, now I can stop that narrating train of thought that would often keep me awake and fall asleep basically whenever I want.
Also they seem to be freely mixing facts about research on mindfulness meditation with anecdotes about all different kinds of meditation. That's nonsense, there is no reason to assume the long term effects are similar.