I think the bigger issue is many of the apps that are coming out (which imo would be the main point of entry for less techy users) point to lemmy.world as the default instance.

Not in the way you think. Yes, you can still comment and post in your own instances version, but for other instances to see it it’ll have to go through lemmy.world first and forwarded on. I think it’s a bit murky when it comes to comment replies, though, I believe those do get propagated directly to the instance originating the comment (i.e. if a beehaw.org person comments and you reply, they get it sent directly), but you can see how disruptive it is.

I believe db0 is working on something like this to help combat the eventual waves of spam and stuff were going to see.