A user checking out one of these URLs does not want to filter only local post on that instance.

On all instances, this url should mean “show me all /c/piracy on all federated instances”

If you really mean /c/piracy only on that instance, then add something to the url.

The current convention breaks the most important aspect of federation and makes its vestigial appendage.

The current way has user asking question /c/piracy, but on which instance ?

So now they’ll all join the same instance . You wouldn’t post anywhere else since no one would every see it.

It’s a recipe for centralization.

I think this is obvious to most users, were deal with “voat with extra steps” here