It’s understandable that organizations try to make their word legible and simplify things. In fact, it’s one of the reasons for the organizational boundary.
As a company scales, there are phase shifts which feel like they suck all the productivity out of an organization. The way to get through as described here is familiar: categorize and capture everything, reduce WIP and loop through your process.
A lot to like in this article (“They avoid scrum and SAFe like the plague.”) but I’ll settle for adopting the core thrust of it and just retiring the entire concept of a PO and never have to debate “What is the difference between a PM and a PO?” ever again.