The same can be said about God, in theory it is just that, a theory.
Whether you believe in God or not, you do have ‘faith’ in something. In your case, it appears that you have ‘faith’ in chance, that you are but a cosmic accident, a roll of the dice, here today, gone tomorrow. Quite a sad way to live. I know, I was there.
IF there is no God, then why is there a premium set on ‘good’?
IF I am just here a little while, to disappear forever, then why should I, or anyone be concerned with anyone else? It is then in my best interest not to subjugate myself to anyone, but to get all that I can, even if it hurts someone else. Because there is no tomorrow for me. What a world that would be.