Giff Constable writes about The difference between design and product management and makes this good point about the nature of the PM role:

A big difference is where they spend their time. You’ll hear me call design and engineering “deep dive” roles, while PM is a multi-tasking role, which is why it is relatively easier for PMs to assume more of a leadership role. Even though we work in very collaborative ways (“rough draft culture”) at Axial, both design and engineering require getting into a “flow state” on a problem. Design takes a lot of iteration and trial and error to get something right. PMs, on the other hand, are bouncing around a million tasks, from clarifying a user story, to managing communication inside and outside the organization, to doing whatever it takes to un-bottleneck the team, to all the things listed above.

This is one of the things that makes Product Management such a challenging role. It’s not just about switching tasks, it’s about developing the ability to switch focus really quickly as well. There is no time to meander from one task to the next. Once you switch to the next thing you have to be in it right away.