Repetition as a positive aesthetic quality

[npcompl33t]

Even under the self citation theory, you have to ask: why would they choose to copy the same word consecutively multiple times?

I can generally explain this simply as a lack of creativity. The scribe might have gotten tired and written the same word once: Let’s say a scribe sat down to work. He diligently comes up with words for 5 pages, but his creative energy is running out. He decides to cheat a little and write a few lines below, and fills the remaining space with similar words or simply duplicates them. 
Also, the same phenomenon is also present in the Codex Seraphinianus; read You are not allowed to view links. Register or Login to view..
Scribe B particularly “abused” repetitions, perhaps You are not allowed to view links. Register or Login to view. and wanted to write a large amount of text as quickly as possible.

Perhaps, but i can think of a few issues with this theory:

• In most cases, wouldn't scribes using vellum be copying from a prepared source, not actually writing the content? Composing generally did not happen directly on vellum. 
  
• If they weren't fully engaged, or were getting 'tired', wouldn't you expect these types of repetitions to generally increase monotonically over the course of their work? Wouldn't visible mistakes also increase at the same rate? 
  
• Copying requires no creative energy, the amount of 'creative energy' to change words halfway through a copy vs copying the entire same word is marginal to nonexistent.