I think the instigator of any conflict and his opponent should lead the charge, as in days of old. And, they shouldn't be allowed to have a battle bodyguard, either.
When did we start having a policy that only the third in line to the throne could fight? That would have put George W Bush up in the skies above Baghdad. He did walk around in a flying suit, I remember. But, I think that was mainly for the cameras.
But, with drones, IEDs, mines, submarines, you name it, war is becoming depersonalised. Many armies can't afford all this junk. But, they can afford live people.
Maybe Putin should put a rocket launcher over his shoulder and stride out into the middle of Ukraine. I seem to remember Mrs T at the controls of a tank.