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'd take all lowercase over all uppercase anyday

Presumably a shibboleth for human-generated content

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

Gen Z illiteracy crisis.