Let me throw a monkey wrench into the works...
Maybe it's not really repitition!
I see a few possibilities.
First, maybe there are subtle, but key, differences that the person seeing them as being repetitive is missing. Let me use an issue one of my students had recently as an example. In one of our forms, there are several places where we do a cross step, and double block (one low, one high). He couldn't understand some why I was telling him to turn one way in one move, and a different way in another... "They were the same thing!" Nope; they're reflecting different strategies, different steps, and they lead to different techniques. But he couldn't see that yet...
Now, imagine if he goes out next week, and starts teaching the way that "feels right to him." That sets up the second possibility... The moves were different, and for one reason or another, someone didn't continue to maintain that difference as they taught. So, today, there are "repetitive" techniques -- but they weren't always.
Finally, there's one more possibility. Not everyone is mentally wired to adapt one approach to various similar situations; if it's not A, then they can't do B. Even though it's a very A-like situation, and B would work -- they can't make that leap. So they have to see as many uses, with unique identifiers, or they can't use it.