To hammer the point through here’s the same comment with the “complexity” removed, a bit more akin to tokenized text:
because of redundancy modern written language has a lot of features that make it easier to read that were added as society became more literal things like capitalization punctuation (a surprisingly recent addition) even separately marking vowels wasnt a given for all writing systems (see old hebrew as an example) capital letter in the start of a sentence saves you from picking that up from context especially when coupled together with the stop (.) signifying the end of it redundancy is actually a very natural phenomenon and spoken language has loads more compared to written examples
its complexity that aids the understanding trading some of the simplicity and speed of writing to better reading comprehension as per why capital and lowercase in latin script capitals are derived from the letters that were chiseled lowercase used to be just a handwritten thing written language naturally evolved to make use of these two systems to aid in reading so things like capitalization are actually completely opposite from added complexity actually making the language easier to comprehend after a bit of an initial learning curve

For some reason this reminds me of [https://en.wikipedia.org/wiki/COBOL](the COBOL programming language), though not even COBOL was batshit enough to use numerals written in plain English. Everything else was in plain English, though, which was supposed to make it easier to read and write, but is in reality a horrible idea.
Though all caps just reminds me of early programming languages in general, since we didn’t separate uppercase and lowercase in all machines back then, instead using encoding schemes like DEC SIXBIT. Saving memory by using only six bits per character instead of seven or eight, and such. Six bit characters had matching word lengths, before the concept of a byte there used to be loads of 12-bit and 36-bit architectures, that more-or-less went away when the industry almost collectively decided to take byte-addressed memory into use.