Being a PO (or Project Delivery) has been a very thankless job. I'm on my way to migrate from PO to a PM, but the team is still very depending on me day-to-day.
It sucks when your job depends on the job of others. If something goes wrong, it's your fault. If something goes right, credit to the team. It's very stressfull and the worse part is that there is no recognition what so ever.
My team is very depending on someone to create small tasks, subtasks, sub-sub tasks, being on every refinement session that takes 2 hours peer week, and it just keeps me away from focusing on the biggest part of the PM work and finally create some impact.