It was a logical argument at a higher plane, at the scale of Universe. I do believe that all Life on Earth had a common/similar origin. Similar = there could have been multiple origins at different places on the planet Earth - I don't know if that has been proven wrong.
Perhaps I should have stated it as if life forms spontaneously....
The point is how far up do you want to go? Say for example:
Z was created by Y was created by X was created by W .... was created by A ... limit -> infinity
(where Z, Y, X ... are life on distinct planets)
At some point it will stop. So, how did the top most life form? It must have formed spontaneously.
If someone wants to call the topmost life God or Gods, who created them?
As articulated by most extant religions, that which is God is eternal.
Consequently, questions such as “oh yeah? Well then where did God come from?” are not persuasive. ‘God’ and ‘everything else’ are two entirely different categories.
Where’s your evidence?
Is it not your position that all life on the planet has a common ancestor?
Or, do you believe there has been more than one ‘spontaneous’ emergence of life on earth?