Every miner knows most holes fill with water sooner or later.

Corollary: Every sailor knows most vessels are sunk sooner or later.

Aircraft carriers and Submarines are not civilian infrastructure, and if they sink offshore where no can live... will usually pose less of a problem like buoyant waste barrels popping up later.

We are in the age of bargain conflicts, where throwing gold bricks at adversaries makes less sense strategically. =3