If you are completely content with your life mentally, emotionally, socially, physically, inter-personally, intra-personally, societally, and spiritually, then I see no reason why mindfulness meditation would be necessary in your life. More specifically to this question, though - which is difficult to answer directly without more details - what are your current meditation practices doing for you? If they are helping stay present and get calm, that’s great! Mindfulness meditation, however, is a great deal more than just being calm and present. It is about self-exploration and discovery at the most fundamental levels. What mindfulness meditation offers that other forms of meditation do not are manifold. In addition to concentration and tranquility, it actively develops acceptance/equanimity and sensory clarity, in addition to love, kindness, compassion, and patience. Moreover, we learn about the relationship between our mind and body, how emotions arise in the physical body, the dynamic interplay between. And the main reason it’s so important to know such phenomena? More understanding means more choice. In other words, the more knowledgable we are about the subjective experience of our internal world (and how its interplay with the outside world) the more creative, resourceful, skillful, and intelligent we can be in any given moment. This is true because mindfulness meditation trains us to see things as they are, not as we think they ought to be. The more in touch with reality we are, the more the world opens up. How often does it feel like the world - and our subjective experience of life - is collapsing down on us? When this happens we are likely not being mindful.