Or, put another way:
The Iowa class battleships had belt armor steel of 12.1 inches thickness. The turret faces are 19.5 inches in two layers.
The current squad-packable (technically man-portable), tripod launched Kornet antitank missile that’s widely available on the world arms market can penetrate ***43 INCHES*** of rolled homogenous steel armor. With a 10lb warhead.
The Granit has a similar warhead, scaled up to **1650**lbs.
Modern capital ship and antishipping missiles make any currently practical level of armor on a ship useless in a peer fight - *if* they hit.
Antiship missiles are not always met in an engagement.Sometimes it can be a small boat with a package or a machine gun on the shore. Those ‘littorals” can be swiss cheese pretty easily, I think.