It makes sense as a reference to build a more cohesive narrative structure from. Imagine you are actually physically there following Jesus on all his adventure

It makes sense as a reference to build a more cohesive narrative structure from. Imagine you are actually physically there following Jesus on all his adventures. It's unlikely you have the supplies or resources or time to accurately transcribe a narrative as you yourself are involved. You probably treat it more like you would treat being the "note taker" in a modern Zoom project management call. "So and so said this". "He said that and said he would talk about it again next week for an update" ... Seems like a sayings gospel to me. Makes sense a sayings gospel would be the most contemporaneous source and then other gaps could be filled in in other ways in order to build a coherent narrative once you've got the time to sit down and really put something big and official together.