Auto-path still would be fatal in many situations. You mention Penny and Louhi - even if you followed a "safe" path, that path is programmed, and is unlikely to account for where mobs are on that path. Just getting to Penny, you have multiple aggressive mobs: dragons, matanga, moths. You'll wander through their area, and unless you do so manually, there's a very good chance any automated path will get you several points of aggro. In fact, dragons! An auto-path would likely not include walking, as that would require detection of where mobs are and identifying said mob.

Same with Louhi - you have to jump down the ledge to get to him, and on the way you have two types of Dragons (the free-roamers, and the sleeper on the ledge), as well as the Anubys. Let's not mention the low HP you'll have jumping off the ledge, and auto-path likely won't account for needing to recover HP from the fall - you'll aggro the undead on your way into the area, if the dragon doesn't kill you for your lack of walking first.

Auto-path is not viable to the level you expect it to be - it will always have an aspect of risk unless you keep yourself to areas ≥2 levels below you. Pagos and Pyros would still have the risk in the form of the dragons they have littered all about the place (Pagos in particular). This auto-path system just feels lazy, imo.