I think being DC is as much or as little as you make it. I've had 3 different DCs, and currently the post is vacant. 1st was ok, bit neurotic, and flapped a lot about how much work there was to do but rarely went to visit other units as I think you're meant to. She did take it seriously and did pick up and sort an issue with the accounts of one unit.
2nd was a job share, which worked ok but one of them was more absent than present...didn't make things very easy for the partner!
3rd has been good, she was very responsive and did visit units, was very proactive about progressing volunteer enquiries etc.
Now the post has been vacant for a year or so, our district secretary is attending division meetings and dealing with volunteer enquiries but nothing else. Commissioner stuff goes to DivC instead. We've had district meetings on Zoom so at least the info is still being cascaded.