theres one issue with these questions of "what are the odds we would have gotten here... that its all random." lets look at a small scale example, you being here on spurstalk right now. what are the odds that today, you chose to come to spurstalk? pretty good, since you're here all the time. ok, what are the odds that you were on your computer at this exact time? you're always on your computer, so thats pretty good. now what are the odds that years ago you found spurstalk in the first place? what are the odds that your parents conceived you on that exact day? what are the odds that the one specific, pathetic sperm that impregnated your mother was the exact one that led to your birth? what are the odds that your parents randomly met each other, and they they hit it off? what are the odds that they lived in the same area on this broad earth? what are the odds that they made every single life decision to that point that put them in that spot to meet each other?
you can make every single, ordinary event, like you being on spurstalk right now, look like it's miraculous. when it comes to the development of life, it doesn't consider all the failed experiments. you would also have to assume every lottery win was a miraculous event as it is statistically improbable for a specific person to win it. yes, if you name the outcome, like "i predict bob smith will win the next lottery" the odds against it are astronomically high. so if 4 billion years ago, someone predicted that humans would evolve over time to the point they are now, that would have been a stupid guess.
but you could say the same for any occurrence. would u think its crazy and improbably that i sneezed at 4:30pm yesterday? of course not. but what if i predicted 4 years ago that on january 13, 2017, i will sneeze at 4:30pm. thats extremely improbable
its also fundamentally wrong to pretend evolution is like a lottery... completely random. evolution is driven by selection, which is the opposite of random.
when it comes to the origin of DNA, we know it stems from single stranded RNA. but when it comes to the origin of life in general and the origin of RNA... you're right, science doesn't have the answer to that right now. but thats why scientists say "we dont know" and they continue to study, research, and make breakthroughs.