If your preference were applied to typography, books would look like this:
IT WAS A dark AND stormy night; THE rain fell IN torrents, except AT occasional intervals, WHEN IT WAS checked BY A violent gust OF wind WHICH swept UP THE streets (FOR IT IS IN London THAT OUR scene lies), rattling along THE house-tops, AND fiercely agitating THE scanty flame OF THE lamps that struggled AGAINST THE darkness. THROUGH one OF THE obscurest quarters OF London, AND among haunts little loved BY THE gentlemen OF THE police, A man, evidently OF THE lowest orders, WAS wending HIS solitary way. HE stopped twice OR thrice AT different shops AND houses OF A description correspondent WITH THE appearance OF THE quartier IN WHICH THEY WERE situated, AND tended inquiry FOR SOME article OR ANOTHER WHICH DID NOT seem easily TO BE met WITH.
(The verbs be and do get capitalized in all their conjugations, because they have special roles in the grammar, making them keywords.)
If typography for prose were like this, people would be used to reading it, and more code in more programming languages would look like that.
The on the other hand, people have experimented with syntax coloring for parts of speech. That actually looks quite bad and detracts from readability; yet lots of coding is done that way.
Code is laid out in certain two dimensional ways that prose is not, and the keywords that get emphasized (whether through CAPS or color or both) occur in certain predictable visual structures rather than as soup ingredients in a wall of text.
Formatting of and typography of prose are not absolutely linked.