- Humanity discovered cells a few hundred years ago.
- DNA was discovered (very) roughly 100 years ago.
- Best estimates on the age of life on Earth are in the range of a few billion years, with it appearing perhaps 1.5 billion years after Earth started forming.
- We haven't created life yet in this incredibly short timespan.
- Therefore aliens/god/ID must have done it, always ignoring the notion that this complex designer would have had to come from somewhere. For some reason, this highly-advanced designer is permitted the luxury of being able to simply pop into existence or to develop naturally through its
own process of abiogenesis, and that explanation is seen as being more likely than abiogenesis occurring right here on Earth.
Evolution does work at the molecular level. Evolution is all about the survival of the best genes. Life is just a byproduct; genes that cooperate with other genes to create a 'survival machine' aka animal, have a much better chance of survival, humans are a great example of this.
We're like the composite-robot battle droids in Power Rangers or other such shows: We're conglomerations of cells that are all built up to fight for survival against the environment.