So that you remember where you have come from.
So that you know that you are a plain, simple human.
So that you know that all the stuff your parents warned you against – bad habits, people who tear you, people who want bad for you, people who play politics, people who have weirdest worst habits – all of that when you see in reality – you know that you have home to fall back on.
And that is why, no matter how much broken, home is important.