"how do they defeat the speed of causality to relay information back home?" Why must 'they' (assumption there) 'defeat the speed of causality', exactly? Even

"how do they defeat the speed of causality to relay information back home?" Why must 'they' (assumption there) 'defeat the speed of causality', exactly? Even at light speed, the information will beat any physical threat to the home region, permitting some kind of response. Also, the idea that 'causality' is bound to the speed of light is, in my opinion, simply a result of our limited understanding. Just as relativity opened new vistas, it is likely a new theory explaining gravity, dark matter, and dark energy will provide entirely new, fundamental understanding - and possibly FTL communication/travel.