It is very convenient to start out with; a miracle happened and we have a bacterium, now just imagine that lots and lots of them are having babies and eventually one of their kids is a bit better than his parents etc etc etc and then we have man.
I have an analogy for a bacterium. Imagine you are in an NFL football stadium. Imagine said stadium is a complete oval spheroid rather than mostly flat and that it is made entirely of Legos. That represents the scale of a bacterium such that the Legos are atoms. Each atom is part of a very complex protein or DNA or RNA or some other structure and each one has a specific job. What a massively complex thing it is.
On a different note I found Dave Berlinski's discussion about whales to be fascinating because they are supposed to have evolved from a land based mammal. Dave considers it from an engineering perspective and all of the changes you'd have to make to a cow to have a whale. Dave said he quit counting at 50,000 changes and the evolutionary time frame is very short from cow to whale. Only a few million years.
Sorry, but that 747 analogy is just ridiculous.
Even if we were to use it as a highly flawed analogy for evolution, we'd first notice that 747's didn't start out as 747's, they didn't even start out at Kitty Hawk, NC in 1903.
In a larger sense they started with birds hundreds of millions of years ago learning to fly and with pre-humans hundreds of thousands of years ago learning to make tools.
They started with balloon flights in the 1700s and with 1800s' engines producing mechanical power, etc., etc.
Of course in theory evolution proceeds without conscious direction and without leaps in imagination.
On the other hand, the human directed advances in 100 years of aviation (Wright bros to today) took evolution hundreds of millions to eventually produce, say, the Peregrine falcon.
Sure, I "get" a lot of people say God did it all in a few thousand years, and certainly He could have.
But for some reason the physical evidence He left us suggests much longer periods.