I can’t really think of a reason for that as Reddit is hated somewhat equally by “both” sides of the spectrum. It’s just something I find interesting.
The thing is that I don’t have those issues on Lemmy, because I usually browse by /local, both on this server and on beehaw. But I had to block lemmy.world with my user on Kbin due to that problem you were pointing out. And miraculously, I can see content from Kbin, lemmy.ml, blahaj, beehaw sopuli, and so on, because there is no way to browse only local content on Kbin as it can be done on Lemmy.