Headscratchers / LEGO Exo-Force

• Of course when your enemies are robots, you need human-piloted mechas, any AI or remote control could be hijacked. But why do robots use Humongous Mecha with cockpits, piloted be human-sized androids instead of just making mecha-sized self-moving robots? That would make them more responsive, and prevent humans from hijacking these mechas.
  • It would also create a class of robots that are physically powerful enough to overwhelm their smaller brethren and which can't be dismantled for failure without running severe risks. Making them too dumb to think of resisting would also defeat the purpose of building them in the first place, as would engineering any exploitable weakness into them. Mech One is smart enough to avoid a full circle revolution where he in turn gets taken out by something he created just as he is attempting to do to the humans.
• Why would the humans build mini-robots during the Deep Jungle arc? Wouldn't the mini-robots rebel against the humans and join the evil robots?