"Why cant a modern airliner with thousands of sensors and millions upon millions lines of code know if its about to hit the ground, and not the runway!"
Because the modern (and the not so modern, like me) pilots that fly them are supposed to use their own well developed sensors to know that if you run out of airspeed and altitude at the same time, it's not going to end well.
Stop blaming the airplane, it makes you sound like a lawyer. A 777 is a machine, inanimate, and only does what it is manipulated into doing.