Write code to connect this system with that system. Teach people what setting does what. Integrate with Entra ID. Create custom reports that hordes of Executive on our side want. Scale out the system from undersized nodes we originally gave it. That's all I picked up by just listening to them. I wasn't involved in the project, just sat nearby listening to it.
This is extremely customizable software that is designed to pretty much run your entire business and touched by over 40k employees. It requires a ton of care and feeding. There is plenty of people who dedicate themselves to PeopleSoft. Zip Recruiter is showing 5 jobs near me for "PeopleSoft Administrator"
The need to teach people what setting does what is a sort of consulting moat that AI dismantles when it can access the right context.