So you subscribe to the Theory of Abiogenesis.
Yup.
This theory states that life originated on Earth through a series of random unspecified events.
Not PURELY random....chemistry has rules.
Just one small problem with that:
Let's say that this theory is True, and somehow a living cell developed from nonliving material.
Now you have a problem. What's it going to eat?
Early life may have been chemoautotrophic. (Feel free to google as you need)
That cell must gain sufficient energy to divide, or it dies.
A single cell cannot absorb energy directly, so what's it going to eat?