The opinion section is pretty interesting as I often seen people arguing over copyright and AI:
So we aren't asking for stricter copyright laws, or stronger protection for copyright holders. That will only benefit the major entertainment companies like Disney and Adobe who have already stacked the deck in their favor, and are happily making deals with Big-Tech and crushing small creators in the process. We're pointing out that the copyright we have isn't applied equally, and is in practice a two tier system. Individuals face ruinous damages for minor infractions. The largest companies in the world face a cost to be negotiated after the fact, if anyone can afford to sue them. A law that only works downwards gives nobody a reason to respect it, and it can't last in this form.

I remember Mastodon was working on groups so I imagine interaction from Mastodon to Lemmy would improve. Bonfire is rolling out groups pretty soon it seems. I've been trying it for a while now and I access both microblogs and groups from Bonfire.
I think part of this is the initial desire to model Fediverse platforms after mainstream counterparts. So you have Instagram-but-federated, Twitter-but-federated, Reddit-but-federated, YouTube-but-federated, TikTok-but-federated. These platforms don't really interact with each other directly, so the Fediverse ended up modeling that incompatibility, too.
That's the area projects like Mbin and Bonfire seem to be better at.