Correct, but if we can "wish" even for doom horrors themselves and they can't do anything but pop up (whether for good or for ill, that's another story), a plain beacon for horrors should be trivial to deal with by means of "wishing". I am not asking for any lesser means, but a "wish" is thematically ought to be an ultimate healing resource, able to deal with curses, afflictions, marks, insanity, old age, whatever.
Point about Furies taken, but we're speaking of curses given away left and right by lousy S1 shamans, not by The Kindly Ones
Somebody's got to eventually have found a way to deal with something as common a nuisance, and unlike horrors, it doesn't even come from the great lovecraftian beyond where basic rules of the Creation cease to function.