Saying that I think the situation in the smartphones today is less about the business model and more about control and surveillance.
Alongside newspapers we had 'zine culture and mail-order pamphlets.
There has always been the option to contribute - the Apple iPhone is quite possibly the first exception.
https://en.wikipedia.org/wiki/Public-access_television https://en.wikipedia.org/wiki/Community_television_in_Canada https://en.wikipedia.org/wiki/Swindon_Viewpoint https://en.wikipedia.org/wiki/Community_television_in_Austra...
They also blur the line between "computer" and "console", since the NES is practically the same architecture as many contemporary "computers". Homebrew games existed, and weren't that far out of reach. Homebrew has existed on pretty much every console ever.
PCs weren't an accident in any way. They are a direct descendant of "home computers". That's why they were called "personal computers" in the first place.
PCs happened by accident.
Before the PC, people had TVs - devices not for creating, but for passively consuming content made by big corporations and the state. And we had games consoles - devices not for creating, but for playing games made by a medium-sized company, with strict approval by a huge company (who want a cut). Strictly censored to be age-appropriate, naturally. Pirate radio? Straight to jail.
Before that people had newspapers - media for passively consuming, intended for mass readership, written at the behest of rich newspaper barons with certain political opinions they're keen to push.
And after the PC, we have smartphones - devices not for creating, but for consuming content feeds, curated by big corporations, with rich owners with certain political opinions they're keen to push. A huge company eager to take a cut. A tiny screen, and a keyboard that puts curly braces three keypresses deep. Can't even debug a web page without connecting to a PC. And soon to be strictly censored to be age-appropriate.
The PC is really the outlier here.