Really? When I meditate I need to turn my thoughts off. With CBT you reframe your thoughts by a process of what I'd like to call creative thinking and empiricism. So for me, it's not an offshoot of CBT, since mindfulness is not concerned with thoughts but with being mindful on whatever your object of mindfulness is (in 95% of the cases it's your body).
Also, mindfulness was ripped out of Buddhism. Mindfulness was "Buddha's" invention on top of Hinduism -- as I understand it. Hinduistic meditation focuses on concentration (note: I stand corrected if I'm wrong), whereas Buddhistic meditation shifts (eventually) towards mindfulness and depending on the tradition you have like 4+ different forms of mindfulness.
What psychologists/neuroscientists did was take these techniques out of their contexts to see if they were helpful for therapy. And apparently -- according to their studies -- they were.
I just know from personal experience how mindfulness damages me, I also know how it can heal me. I prefer to use it for healing purposes. For me, when I need to be more connected to my body and to other people I use mindfulness and loving kindness meditation (metta) as a practice. Metta makes me more connected to people and mindfulness acts as a multiplier towards that connection (since I am more aware of all my feelings). Whenever I need to code, focus and analyze more I tend to be less interested in meditation practices.
I'm noticing it's not a hoax. I've meditated 500+ hours and my baseline level of being aware of my feelings is slightly but noticeably higher. Even if I don't meditate for months.