You have to hide the rare metals (and all the SE ores) in the mod settings. It's a startup option so you have to restart after allowing for them to be hidden. Particularly for the Rare metals, because it takes a fluid to mine you also have to check the extra box to confirm you understand that the chance of mixing ores that need fluid may mean that a particular miner could cover ores that need different fluids and this will stop the miner when it changes the ore tile to one needing a different fluid than is present in the miner.
tl;dr check more boxes in the mod settings.