My guess is that Oracle has audit logging support but it was not turned on by the implementation vendor. Typically a customer uses a partner for professional services to get it up and running for training and handoff. So it’s probably a mix of people that kicked it up. The one constant with Oracle deployments is that they are always over budget and rarely work and it’s somehow always a mix of faults. So from a high level view it is probably something to do with the way Oracle engages or who they partner with or both.