It’s because the small dozens of us that care about the freedom that the small internet afforded vs algorithmic content discovery is now the minority and no big platform cares about us.
In the early days of the internet, they had to care. They had to convince people to leave their beloved forums and IRCs and move to Facebook or Reddit.
Internet users were fairly niche and fickle. Now everyone uses the internet and most people don’t care about their own freedoms wrt how they interact with technology.