000,
You are not accepting responsibility for the actual work performed as a Cat C at the end of a Base Maintenance visit. You are issuing the CRS, which from the C standpoint only means that you have checked all tasks are completed and paperwork is correct and certified by appropriately qualified personnel. Most Cat B holders who have more than the minimum experience will also hold the cat C.
I can assure you it is an advantage to hold, and it is most definitely not mainly management who hold the C.