Can you elaborate on why this is "clearly" the case?

I can't train your intuition for you.

Who trained your intuition?

I am guessing conspiracy theory videos?

I don't know about that. More like a Democrat Twitter clone. Liberals prefer echo chambers. And I don't mean that as a slur. They don't want to see or engage with content they disagree with. Bluesky fills that need for millions.

We’ve incrementally changed the definition of a social network, and hardly anyone notices, or cares.

X is now a place where you can post the most anodyne comment like “Happy Saturday folks” and immediately get 50 trolls arguing that it’s NOT a happy Saturday, and BTW you’re an ugly BIT*H. Every one of Elons’ 50 daily posts will be boosted and you have to see them. Your feed is now filled with right-wing content 24/7 from anyone who paid for a checkmark. From the moment you log into the system, you may be in fight-or-flight mode, and every single interaction is a potential argument. That’s our collective definition of a social network now, and if you want to opt out of that, you’re in a “liberal echo chamber”.

No, Bluesky lets folks actually use a network as before - finding interesting content, connecting with others, and yes, having civil disagreements. The change is that trolls whose only purpose in life is to find as many people as possible to argue with and shout at, can now be blocked from a user’s feed. It’s not a new innovation - it’s the way it used to work.

Did Twitter/X remove blocking or something?

Blocking on X has been severely watered down.

Bluesky has a nuclear block which is awesome.

Conservatives love their echo chambers too. This is more of a modern cultural phenomenon than a political divide. The conservatives in my circle react strongly to any idea they don’t agree with and don’t want to see it, while the liberals tend to spread ideas they hate for rage baiting.

The way our social networks optimize for engagement is the root cause, since boring balanced content doesn’t create advertising revenue.

Conservatives love echo chambers so much they're willing to eradicate trans people from public view entirely so they don't have to think about them.

This isn't a liberal thing. There are tons of conservative echo chambers. Twitter has just now pushed away the liberal echo chamber side of things, so liberals are leaving. Everyone makes their own Twitter communities depending on what pages they follow.

People have been upset about the direction of Twitter, for a variety of reasons, since Elon bought it. BlueSky was simply the best alternative available when people began leaving Twitter in droves. I don't think you can assign intent to the creation of the platform, which predates all of this.

I also think it's naive to accuse any particular group of people to be more or less prone to seeking echo chambers. That's endemic to humans in general, though certainly not completely pervasive.

I don't assign intent to the creation of the platform. I'm observing a change that happened to it at a point in time around when Jack left it, in the context of what else was happening

I... what?