What's the idea behind not using capital letters?

I found it pretty hard to read without the caps. I guess the punctuation mark is too small for my elderly eyes, and my brain sees it like one gigantic sentence. Perhaps the author of the blog is a fan of Kafka?

Gen Z will often write like that, feeling that using capitalisation feels too "formal" for non-professional communication.

It's feel just the next evolution in our written messaging dialect. Gen X had c u l8r?. Millennials didn't have to pay per character, and got full qwerty keyboards so opted for normal sentences. And now Gen Z have decided that auto-capitalisation is unnecessary.

I can't speak for the OPs case, but it's worth keeping in mind that not all languages that people are coming from have capital letters as a concept.

I actually didn't notice the lack of caps until I read this comment

Presumably a shibboleth for human-generated content

I'd take all lowercase over all uppercase anyday

The author is trying very hard to look like they are not trying at all.

Gen Z illiteracy crisis.