@boaty
I wonder if if emerged from someone's research project? The null hypothesis being that the brain *needs* the characters to appear in the correct sequence; the above disproves that.
I used to pity those whose languages are built out of pictograms, as they have to learn, perhaps, thousands of them. The OP hints that our brains treat clusters of characters as a picture/pictogram of sorts and words become one of the myriad of objects we recognise in our daily lives: 30,000+ words, thousands of household objects, thousands of plants and animal species.
We have billions of brain cells, with which to manage all this and each cell has about 10 connections to other cells, so it is thought that the patterns of connections are what achieves any given task. Having one cell do one task and one only is a waste of resources so having it participate in dozens of 'teams' makes it a multipurpose thing, in constant use.
Pucture a collection of 50 cities, each with 10 roads to its near neighbours; the number of permutations of picking, say 6 cities from 50, for a task is already quite large but the number of route permutations to complete a circuit of those 6 is enormous.