the weight reduction resulting from the future use of Unmanned Aerial Vehicles
Then who do you blame if something goes wrong.
Way back on my first RAF squadron in 1962 I was informed by some some technocrat that pilots would be out of a job within ten years. They're still saying it. Unmanned trains and other surface vehicles have the advantage in that if something goes wrong you can stop them. You can't do that in the air. Unmanned ariel vehicles at present are considered sacrificial if necessary.
It is going to take a long time, decades, before a system is built that somebody has the confidence to sign off as perfect, because perfection is what you will need.
For most, if not all of us, it will never happen so at least we can continue to put foward ideas.