This is a kind of neo-liberalism of the emotions, in which happiness is seen not as a response to our circumstances but as a result of our own individual mental effort, a reward for the deserving. The problem is not your sky-high rent or meager paycheck, your cheating spouse or unfair boss or teetering pile of dirty dishes. The problem is you.
It is, of course, easier and cheaper to blame the individual for thinking the wrong thoughts than it is to tackle the thorny causes of his unhappiness. So we give inner-city schoolchildren mindfulness classes rather than engage with education inequality, and instruct exhausted office workers in mindful breathing rather than giving them paid vacation or better health care benefits.