You're correct, there are. The problem is that there aren't enough qualified applicants, or they are unwilling to do the job, or to work the shift, etc.
Example:
https://www.washingtonpost.com/news...d-6-2-million-job-openings-whats-the-problem/
There are more than 6 million open jobs in the US alone, a huge percentage of which are in the technology sector and that number is growing. What is needed is skilled people to take on those roles, which is why so many companies are paying for qualified applicants to go to school to develop the necessary skills to join the industry at an effective level.
I'm in D-Level management; I lead a team of managers with oversight over their operations. If that somehow became something my phone could do for me, I would do what every person in the history of industrialization has done ... learn a new skill or migrate to a place where the skills I have are wanted. The only alternative is to give up.
The belief that because people do x today that people will always have to do x is misguided and dangerous. The pursuit of higher ambitions requires the belief that everything that can responsibly be taken off of our plates is taken off. Having busy work just for the sake of having someone be busy is just silly, not to mention a serious waste of expense. Do you think businesses should be paying people to handwrite every memo that goes out, instead of leveraging computers for someone to type on and software and servers to deliver emails? Of course not, that's a ridiculous idea. And it's exactly the same amount of ridiculousness as the idea that we won't create new ways for people to spend their time if the thing they currently do is optimized. That's what growth is.