"Your people" is not a demographics. By not being clear on who they are, they will not feel like you're speaking to them directly. When they know they're your people, they will also bring more people to your community.
Knowing your why is great. It may provide you with a ton of motivation, but it doesn't mean you're clear what you're building. When we're not clear on what we're building, it's a big reason why not much building is happening.
(Hover over the workshop below to see the description)