It's not tho. We've been at it for about 70 years now. Returns have been diminishing exponentially if you look at the amounts invested and we still have bumbling contraptions that are useful in very narrow and contrived use cases.
The whole hype is based on wishful/magical thinking. The booster arguments are invariably about some idea in their minds that has no correspondent in the real world.
Personally I do not think that we have seen the full battlefield impact of the last 10-20 years developments in microcontrollers, battery, power electronics, electromotors, MEMS sensors, imaging sensors, control firmware, computer vision and object detection. Capability per dollar has increased by a few orders of magnitude in each of these domains. We are seeing some hints of the potential impact now after Russia invaded Ukraine - low-cost drones are now killing and damaging just as much or more as existing high tech weaponry. These systems are crude, with limited autonomy, but it is already enough to wreck havoc. I do not think development of these systems have stopped, unfortunately.