1. An army that isn't highly mechanized isn't going to be fast at anything if it's soldiers are overloaded with armor, weapons and what not. Reducing soldier load - patrol, march and combat - makes for faster soldiers who aren't tired out of their wits and who can think and act fast. Even in an mechanized army, depending on the shape of the terrain, one cannot depend on vehicles to haul an infantryman's ass close to the battlefield. The load an infantryman carries has an impact on how fast his team, squad, platoon or company can execute an op. You know what the Taliban called overloaded western infantymen in Afghanistan? Donkeys. https://mwi.usma.edu/the-overweight-infantryman/
2. <ignore>Are there any other false logics and invalid keen observations you want to use to try to overawe me?</ignore> Edited response: Okay, that response was snide. My apologies. You're right that a soldier can't dodge a bullet, but that isn't what I'm asking for, is it? I want infantrymen who don't destroy their bodies bearing loads that their body isn't designed to support. I want armor that'll give them reasonable protection at a reasonable cost in mobility. I don't donkeys who can't pursue a retreating enemy and harry them to death or close with an enemy quickly during an assault. These are, I think, reasonable expectations.
3. We're agreed. If you'll read up the thread, you'll note that I did not argue for infantrymen to fight buck naked to save weight. I argued for reasonable protection.
4. I sound callous for saying this, but everyone and everything is expendable to the military mind in pursuit of a military goal. Ask all the soldiers who ever fought a rearguard action or a foiling raid with very little hope of survival or the first few waves to step onto a hostile beach. You also forget the corollary to your rule. Is it better to be alive but with a failed mission because you were borne down by your armor?
Speed is one of the principles of war. Body armor, surprisingly is not.
1. speed in op execution, not speed of individual soldier is a principle of war. unless you were talking about personal duel. It wasn't since human found gunpowder.
2. speed of a bullet is always much faster than the fastest soldier.
3. BPJs save lives from many non-direct but fatal injuries like shrapnel, IED, blunt trauma etc.
4. BPJs without the plate weighs much less and can still protect upto 7.62x39 steel core rounds from a certain distance. Regular jawan is not mid-western gunslinger where every second counts. He/she might be slow but it is better than be dead and not complete the mission.