constrictai plot hole

in episode 11 of ROTS it's revealed the constrictai have created massive tunnels connecting each serpentine tomb to make a central fortress if they could do that, why didn't they ever leave? and free the other serpentine? it's not like they're deep underground. their tomb is literally the 'mountain of a million steps' they could have just tunneled off to the side are they stupid? submitted by /u/Salt_Refrigerator633 [link] [comments]