Software plays a very big role in all those other activities too. Even a company with no in house software development uses software and pays for it's development, the coding simply happens somewhere else.

As long as value added by software development pays for the devs wages, companies will keep paying for developers to work.

The upper bound of it is only that everything is automated by software. But that is an utopia where it makes no more sense to talk about jobs anyway. Not in the same sense as what jobs are today at least.