Ironically, it would take a lot of effort for me to type without capitalization and also undo capitalization auto-correct. It would not come quickly nor naturally.
They may not type it that way, you can select all and lower case all with a few keystrokes in vim. Should this be the case, it lends itself more to the performative nature of the style over clear communication
It's the equivalent of TikTokers who provide hot takes while eating food. It's done to feign being superior and aloof, e.g. "This is so easy to understand and so beneath my intellect, I can tell you about it will I eat these crackers"
George: To cover my nervousness I started eating an apple, because I think if they hear you chewing on the other end of the phone, it makes you sound casual.