“Ingenuity”, it is hard to define, and therefore hard to replicate.

The job of a plumber nowadays, for example, requires some things that are hard to automate/replace. This won’t be the case when people live in standardized housing.

For as long as the cost of replacing the level of ingenuity required is higher than the benefit of “automation” (which by the way is only a very discrete form of AI) those jobs are going to be fine.

For a job to ge replaced all it’s necessary is that AI becomes more affordable than human exploitation.