It honestly starts to sound like they just botched the design and placement of these cables - placing them in shallow and exposed passages, with no proper defense against dragged anchors.
If only they had had you in the design team back then when the cables were put in place.
I'm sorry I have no snark-free way to respond to this.
Unfortunately the Baltic is pretty shallow and fairly featureless - the gulf of Finland - between Finland, Estonia, and Russia averages 38 metres deep
Yeah, why don't they lower the floor of the entire Baltic Sea??
Real shades of "that cable shouldn't have been dressed like that, in a dark and narrow channel, clearly marked on navigation charts(to mitigate exactly this scenario, from good captains at least)" energy.