The presence of organic remains does not mean that it is of organic origin.
Discussion
But it also does not mean it’s not. Crude oil produced from new algae is identical to the one we pump up, just cleaner.
I recommend you to read the studies on the inorganic origin of petroleum, in fact the theory is more alive than ever, you are only studying one side of the story.
https://en.m.wikipedia.org/wiki/Abiogenic_petroleum_origin
Fair enough. But you said “accept the evidence”; this is a hypothesis like everything else so no real evidence.