Why is the infinite monkey theorem usually depicted with chimps when chimps aren't monkeys?

Here's something to think about. 

My take: most people are stupid and lazy and can’t tell the difference. 

On the other hand, it doesn’t really matter all that much and you can call the theorem “infinite primates who are not as advanced in communication as humans theorem”. 

But it is too long and “monkeys” get to the point just fine despite persistent visual inaccuracy.