In this post I don't want to convince you that you need to meditate. I want to explain what creating a habit of meditation can do for you, and you can decide for yourself whether it's something you value enough in order to give it a shot or not. If this post was titled "Why lift weights", I would be saying that lifting weights increases your strength and/or muscle mass, and will probably make your body look nicer. If that's something you want and value, obviously lifting weights is one way to go about it.
If you want to increase your capacity to exercise conscious control over the content of your own mind, or in other words to be more the influencer of your thoughts rather than to be influenced by them, you should practice meditation. Specifically, you should start with single pointed focus meditation.