Self-awareness is very important for you and people around you. Self-awareness is what allows people to walk down the street without bumping into others, or not intruding on someones privacy. Self-awareness is more than just having a physical presence in the world, it also means you know where you are in a social, political, economic, or any other environment you might find yourself. Having self-awareness allows you to participate and interact with people in different environments without damaging them or yourself.
Understanding self-awareness is key to being able to function in a normal society. That is why many who struggle with self-awareness tend to find themselves with little to no friends, and a very little role in society.
I hope this helps.