Is there a harmful side to mindfulness as it is practiced in Western materialistic/capitalistic cultures?

**Is there a harmful side to mindfulness as it is practiced in Western materialistic/capitalistic cultures?** Clearly the modern mindfulness movement has been very successful, but I'm wondering if that's at the expense of losing its spiritual core. And it concerns me that what we are left with is just another kind of narcissistic solipsistic selfishness. Is there any validity in my concerns, or am I worrying about nothing?