I used to do this a long time ago just because that's how my brain would process how I'm talking on AIM/ICQ. Though I wouldn't add the period at the end of each new line, that is weird.

It's how everyone with a smartphone learns how to write these days. Editing large blocks of text on a smartphone is still extremely annoying, so people get used to hitting send between every few words.

Yimspeak.

This was how I learnt to write, as it's how I think.

I latter learnt in school that writing is only deemed correct when it's stylised into elaborate sentences structures that no human would use when thinking in their own heads.

If you're just trying to convey a thought I don't know why people care?

Could you not understand the point OP was making or something? In what way is this a less valid way of writing (aside from the fact it's not what's taught as correct in school?)

I can't speak for others, but my own internal monologue is certainly not one-line LinkedIn-speak.

Is this satire? Please, lord Jesus, let this be satire.

you know in your heart it's not

I think it started on LinkedIn, where posts got more reach depending on how many users clicked the 'See More' expander link, so users who wanted to be 'Thought Leaders' were incentivised to present their banal ideas using as many newlines as possible.

\n;dr