Well, the differences between military or field use and marine use are enormous.
This ones come with very large magnification 10x - 20x with large lenses 65-80mm - and are very heavy, indeed. Those binoculars are used by gunners are only for field use where weight does not matter and are usually mounted on a tripod.
The marine binocular, whoever is for (2)hand held use and as such the magnification must be limited to 7x or 8x as anything larger is impossible to hold steady. Besides, the human eye is only able to utilise the brightness of 7 or so. Binoculars with 50mm lens and 7x magnification have the closest brightness (50:7=7.14) and so anything above that, is an overkill.
Certainly - a high quality, expensive marine binocular is n o t for to be held in one hand or for looking at your mast head or to read the name of the boat's name a mile away, but to identify landmarks, look for unlit or badly illuminated objects in the direction you are heading at night and so. It's weight helps to hold it steady and the focus does not have to be adjusted constantly. For playing around, an 8x21 binocular, which is easy to hold in one hand, is more than enough.
As for someone else picking up the skippers binocular and play with it, l have nothing to say.
The full rubber armour, the marked adjustable setting of the ocular, the adjustable focus with huuuge dept of field, the quality and clarity of the lenses the proven 30+ year warranty beside the pleasant feeling holding it are features which are not easily appreciated by the budget conscious buyer.
My grand father's first WW Leica binocular is a prime example. It is still the same as it was more than hundred years ago.
I rest my case, Your Honour, in defence of quality against price.
Pauca sed bona!