Software development isn't just the act of producing a deliverable that is being gate kept by people who use their own body. Software development has become specialized enough that it is often highly domain specific. To replace the "trade" you need to automate the software part and the domain knowledge part. If you can do both, you've automated every single white collar job in existence.

Since it is possible to write software for machine learning, which is used to solve problems that classical algorithms failed to solve, the amount of problems that cannot be solved using software is shrinking rapidly. If you can write software for any domain, you can solve any domain by using said software.

General purpose software generation can be reduced to AGI completeness. In a way, it is the last job that can be automated.