The difference is that we are very early in our investigations of abiogenesis. it is only recently that we have learned the chemical foundations for life (even the simple fact that DNA is the genetic material was only learned 55 years ago). We are also only beginning to really understand the conditions on the early earth. In addition, when we have investigated this question, the obstacles that originally appeared have, over time, been found to be *less* of a problem than expected. It was originally thought that organic compounds could only arise in living systems. That was shown wrong. Then it was thought that amino acids couldn't form under conditions expected on the early earth. That was found wrong. Then it was thought that polymerization to form more complicated chemicals would be unlikely and that was found wrong. And it was thought that membrane systems wouldn't be able to form and *that* was found to be wrong.
The problems are that we do not understand the chemistry for life nearly well enough to solve this problem yet. But each obstacle that was thought to be there has been shown to dissipate under study.
So the question of abiogenesis is closer to attempting to bridge a gap than anything else. Life *is* a chemical process. The main question is how the original chemicals came together in the correct amounts and in the right places.
We can also turn this around and note that *every* time we have found a cause for *anything*, it has always been a physical cause. That is absolute and nothing has ever even hinted at anything different. So, again, it is reasonable to suspect a physical cause for the beginning of life.
Something zapped them in just the right way.
It wasn't Charlie Darwin. He just noted some of the eventual effects.
Those chemicals had to be forced to merge in the right circuitry. 14 or less billion years is not enough time for the process to start. Plus the processes had to survive a varying environment. One cosmic ray could ruin a bacterium's day. Plus all the other environmental thingies that could strip it apart.
Give it up, Einstein. You were produced by something beyond your comprehension. And a lot smarter than you.