If you wanna join lemmy please use a smaller instance like the recommondeed here: https://github.com/maltfield/awesome-lemmy-instances (simply take on of the recommondeed, makes less of a difference than you think)
When you click on one you go directly to the content without the need for a log in.
BeeHaw defederated all the major lemmy instances, pointing someone towards a website where they can’t interact with 80% of other users for reasons they likely don’t care about seems silly. If people want to make BeeHaw accounts once they learn about it, more power to them. But the average user is going to want as seamless of a transition as possible, and getting a crash course on defederation is the exact opposite of that.
Read: just two instances who got really big, alongside literal tankies (but not dot-ml) and some fash
Just in case you're confused, most of their blocked instances are not even Lemmy instances but the general ActivityPub background radiation nobody really wants to see.
Also, if just two instances get big enough to be "all the major lemmy instances" than isn't that a problem of federation to begin with? Some admins need to learn to just shut registrations down jfc.
Whatever the ideal decentralized setup may be, the truth of the matter is that the current setup makes it significantly harder to surface content from instances outside of one's own. I'd prefer to point people towards lemmy.world than to send them to a smaller server and have to field questions about why the servers they're trying to join are out of date or possibly not available at all. As people get more comfortable with the setup, they can branch further out into the federation as they please.
Technically they are also be able to comment on beehaw content, but then only their members can actually see that comment because their instance will have a copy of that content but beehaw won't publish it to the other instances, so it doen't make much sense to do so