To jump in front of a bullet that no one wants to be struck by? As a PM, I want my eng team to be courageous and stand by their decisions rather than respecting me only once I offer my self in a sacrificial ritual.
Are they technical decisions? Yeah, sure, that's on them.
But a LOT of decisions in reality are ones where there is no clear "organic" owner. In that scenario, assuming nobody else is putting their hand up to own it, that's the PM's responsibility.
Nobody will ever tell you this in interviews, it's never part of the job description, but it is one of the most important parts of being an effective PM.
