Nope, you missread my numbers.

I assume it takes one person 2 weeks to fully analyze an app (we are after all looking for well hidden malware, possibly downloaded from network after some use). Times 2.2 million apps. Times an average of 3 updates during its life time.

There are not enough apple employees to pull what you calim. Hence approval is semi automatic, just like Google.

Edit: 1 billion changed to 2.2 million, my bad.