Troop padding for naval battles and airstrikes

INFANTRY PADDING - It seems to me that you can avoid damage on your high value armaments by simply padding with infantry. This makes sense with a conventional land battle where infantry would be placed in the frontline to protect the big targets. However, in actual RL battles such as airstrikes, submarine strikes, and battleship strikes, they would normally ignore the infantry and concentrate on the high value targets. I wish that the game would take this into consideration. I used a submarine flotilla to attack a mixed enemy unit - and lost - and almost all I got out of it was some infantry casualties. All the naval vessels I attacked were undamaged. When I bomb a target it seems that the same thing happens. Come on now. Infantry on ships are merely passengers, there's very little combat defense involved. I know that the defense at sea is less, but if you have 50 or 100 infantry it's enough to protect the battleships, subs, etc in the group. I think the defense capabilities either at sea or against air attacks should be modified. It doesn't make sense!