This is a fairly common complaint with stoicism. Just because you're happy with what you have doesn't mean you can't also be intrinsically motivated to make life better for yourself and others. But it also leaves you in the wonderful state wherein you don't mind the outcome of your efforts because you were already happy with your state to begin with. It's a fuller appreciation of what you can control and what you can't and the in-between states where you can control your inputs but not the output. You start to set goals that focus only on the actions you have complete control over and don't worry about the outcomes you can't control.