Pathfinder WotR has a forced solo section. You can always complete it since it is a stealth section where you get a bonus invisibility spell applied to you. It isn't always about combat.
An implied point I was making is that Larian is not exactly known for balance. Their history is full of awkward difficulty swings, perhaps by design, as they also tend to leave things open-ended enough for you to really abuse things outside of conventional thought to get through. But even with that thought, an intentionally forced solo segment in a game that uses the DnD ruleset could be awkward for any developer.