Eh, it's a benefit and a drawback. For those of us that don't use browsers to access lemmy, crossposting is much harder for one thing. Then you've got bots and people that don't even know that crossposting exists at all.
But, the ability to choose which communities you block and thus streamline your feed is too big a benefit to really be infuriating in natural general. Once there's a built in way to migrate block lists, it'll be even less infuriating.
But yeah, you gotta block the bots that don't crosspost correctly, or they're utter spam machines. If users behave as bots, gotta block them too. It sucks, but it's miles better than trying to artificially limit communities.