I mean, we’ve already seen that the Red Line is connected to the sea floor, so that alone makes the idea that there’s some anchor holding the Red Line in place pretty ridiculous since the whole point of an anchor is to prevent a buoyant object (a ship) from drifting away due to tides and ocean currents,
Even if the Red Line was just some giant magically buoyant rock which was just floating on the ocean, how would removing its anchor be a good thing? That would just cause it to drift around the planet and crash into islands.
The dude who made this theory claims that he works with anchors, which is incredibly hard to believe since he seems to have no clue how an anchor works