Parent Activities vs Responsible

Hi,
I was importing some activities from MSproject to projeqtor and one thing that I realized is that parent activities need to have and assigned responsible in order to set them to a "handled" or "closed" status. However, generally a parent task generally is used to "group" small activities, and these small activities have their responsible assigned, and very often, a different responsible for each task. So, based on this scenario, somethimes is kind difficult to define one responsible for the parent activity.

So, to the point.
- Am i the only one working in the scenario above?
- If not, would it be possible not to have a responsible set for a parent activity and still being able to change the status of the parent activity to "handled" or "closed"?

Thank you very much.
Kind regards.