Do atheists mislead theists by invoking evolution and hiding the unproven abiogenesis?

Whenever there is a discussion of creationism, atheists try to counter it with the evolution theory, which is no doubt one hundred percent correct & an established fact. But the real contender should be abiogenesis (which remains an unproven hypothesis) and not evolution. Evolution comes into picture only after"life" is born. Atheists do not have any explanation for the origin of life. Whatever explanation they force on the theists seems to ignore the fundamental characteristics of life, compared to pure matter. How can life be created "by chance", which is ridiculous even to think about? In any case, it remains a totally unproven hypothesis. Atheists, please argue on the basis of origin of life and not evolution, if you don't like god explanation.