Not really, no. Acceptance and Commitment Therapy is a fairly popular psychotherapeutic approach that makes use of mindfulness. The objective of ACT is to move patients towards valued behaviour and a meaningful life. In order to achieve that, it uses mindfulness practice to facilitate acceptance of distressing internal experiences and re-orient the patient towards the present moment.

It's very easy to say "just do stuff that matters to you", but there are all sorts of internal obstacles to that. Some people are very anxious and find it more comfortable to avoid new experiences, even if those experiences might ultimately be rewarding. Some people are lacking in confidence and assume that they'll fail at anything they try. Some people are so overwhelmed by emotional pain that they struggle to just get out of bed in the morning. Some people are stuck in self-destructive habits that temporarily soothe their distress but worsen the circumstances that contribute to their distress.

Mindfulness doesn't fix a crappy life, but it's a useful tool. If you can observe your anxious thoughts as just thoughts passing through your mind, you might give them a bit less credence. If you can learn to sit with your distress and tolerate it, you might be a bit less likely to have that drink or distract yourself with a video game or cut your wrists. If you can learn to focus more on the present moment, you might worry a bit less about whether you'll succeed or fail and take a bit more pleasure in the experience of trying.