An analogy is not a relationship
At some point, they grow so far apart that they cannot reproduce easily
The country cannot reproduce easily? How does a country reproduce?
Sure! Well, for one, we share more genetic material in common with chimpanzees than chimpanzees share with other apes. That certainly suggests what I'm talking about. I'll try to find a recent paper that shows that.
That does not even address your statement "Not only have apes evolved, they have evolved at least as much as humans have evolved."
Can you show that other apes evolved at least as much as humans have evolved? What do you use to measure evolution?
Yes you can. You compare DNA. Humand DNA and Chimpanzee DNA share more in common than Chimp and Gorilla DNA. That says something abot how much other apes have evolved relative to one another.