No, that isn't why I'm calling you stupid at all. That isn't what your agurment was.
I'm calling you stupid because you think engineers and scientists could have replaced plurabers by now if they'd just been smarter or worked harder. You seem to believe that replacing such a skilled trade will easily happen in our lifetime.
You have absolutely zero clue of which you speak. You know nothing about engineering, you know nothing about plurabing, you know nothing about building trades or skilled trades in general.
Seriously, how old are you?