Every time I go down this rabbit hole I get re-convinced of panspermia. Maybe when I retire I'll study enough statistics and molecular biology to try to get my head around it. Or by then we'll be talking to aliens and the question will be moot.
you can do a mooc on molecular biology pretty easily if your goal is to get a superficial understanding of it. you don’t need to wait until you retire :)
once you look at microbiology you cannot unsee that it looks just like a massive, complicated stochasticaly-driven computer