I don't see the link you make with specialization. But on the interoperability itself, yes, it's exactly that. We do not advocate a single type of battle tank, a single type of aircraft, a single type of ship, a single type of rifle. We advocate that when two units, two soldiers, are fighting side by side, they can work together. They can exchange information they need, they can talk to each other, they can know what to expect from the guy next door. There's a similar type of training, a similar level of training, so that the commanders know what they can expect from their troops, and so on.
With interoperability you are different, but you work together. It starts with the mindset, with the brain, of course, through education and training.