My thoughts are exactly this: there really is no such thing as right or wrong. We are simply bound by either man's law or physics, and what we are taught what right is or wrong is. Ultimately, it's arguable if that started with religions. That's another topic.
We are also a product of events we've witnessed or went thought and every other events thereafter.
On that note, you're looking at life in black and white. Nothing truly is. Unless you can provide a formula or even formulate a reason to randomness then we'll find the common ground.