Even manual labor is uncertain. Nothing in principle prevents a robot from being a mass produceable, relatively cheap, 24/7 manual worker.

We've presumably all seen the progress of humanoid robotics; they're currently far from emulating human manual dexterity, but in the last few years they've gotten pretty skilled at rapid locomotion. And robots will likely end up with a different skill profile at manual tasks than humans, simply due to being made of different materials via a more modular process. It could be a similar story to the rise of the practical skills of chatbots.

In theory we could produce a utopia for humans, automating all the bad labor. But I have little optimism left in my bones.