Why is it so hard for people to believe that oil is abiotic?

If oil were produced from the remains of ancient sea organisms, wouldn't you see a massive amount of oil in the deepest parts of the ocean? Oil is constantly being pumped out of the earth, by nature. You don't need to pump it, you just tap into the earth. The earth constantly produces oil. Just look at the gulf of Mexico, oil is constantly coming into the ocean from the ground. The earth is constantly replenishing oil. We don't need to drill for it, we just need to tap into this infinite supply. Imagine being able to tap into the oil that is being produced by the earth, instead of pumping oil out of the ground. Unlimited oil, every day.