No. All that will do is make 11 more individual components, all distinct from each other. Though it could be a useful intermediate step - see below.
Make one individual beam into a component (R-click, Make Component). You don’t need to explode the group first.
Delete the other individual group beams.
Copy the new component to replace the groups where they were located.
OR, if you made the other beams into different components:
Select all but the original ‘beam’ component.
Go to the Component Browser, R-click on the ‘Beam’ component, and choose ‘Replace selected’.
Depending on how hard it is to manually locate the other beams and move a copy of the Beam component to replace them, the second option might be quicker.
It is never necessary.
It might be useful, depending wnat you want to do with the set of beams. For example, if you had a multi-floor building, and all or several of the floors are identically structured, it might be useful to make a component out of the set of beams, and copy the whole thing to another floor or floors.
Then if you change the arrangement of beams on one floor, all the other floors will change to match.
And if you change any one beam, all the other beams in all the other floors will change.
That’s the power of components.