I mean, yes, Dbzer0 still exists, and yes, you can access it from other instances, but Lemmy.world is the biggest one and users here being cut off from it from here will strangle the amount of activity it gets. Visibility is important for the health of other instances and their communities. There’s a good reason why alternative subreddits never outgrow the main ones.

Yes and no. While it's true that piracy might not get "drive-by" traffic from l.w. users, those users who become aware of it, or who want to access it will be forced to create an account elsewhere than l.w. which will also help with redistributing users to smaller instances.