>Before the apocalypse, mankind was highly advanced and did everything with nano machines
>whole atmosphere was full of nanobots that could create them whatever they desired
>after the apocalypse, some people with limited knowledge and imaginations used this technology to create gigantic organic looking mechas (titans)
>Whenever a titan pilot loses the control, the titan on autopilot tries to get a new control-device (by devouring humans, in hope that one of them would be a titan shifter)
Thats probably as dumb of a theory as the time traveling one.
What is so dumb about it?
To me, it seems to be the only possible explanation for titans that doesn’t break the law of conservation of energy
There's your problem.
could you be so kind and explain me what i got wrong?