Not sure that's a bad thing.
But, my brother is not an Eagle because an SM went AWOL with all the troop's blue cards and no other scouter was around to back him up and encourage him to hike over to the next nearest troop and figure out how to reconcile matters. So, I don't see a meticulous advancement chair as a bad thing either.
@qwazse, there are a few ways to avoid any records problems.
First, we tell all of our scouts to keep their handbooks up to date and keep a scan or picture of ALL pages. We also tell them to keep all their blue cards. Partials are kept by the scout. When they get sign off we tell them to scan/photo of those too in case they "get lost in the process" or something. This way, regardless of what happens with the adults processing paperwork, the scout always has his most recent update.
Second, the unit has ALL of the scout's records in TroopMaster. The scout knows his camping and service history, as well as all his rank advancement and MB data, also training. These are all important things for the scout to now. It allows them to keep track of their scouting history. We encourage them to keep this same data in their handbook and keep that up to date (with scans/photos) too.
Third is ScoutNet. Whether data is entered from the handbook directly in to ScoutNet or imported from TM to ScoutNet, the process of the original inputting must still happen. Using our troop's approach we have a primary (handbook and scout records), secondary (TroopMaster) and tertiary (ScoutNet). We even have a fourth back up since TM is backed up in to a cloud environment. ScoutNet is hosted inside of BSA there's always a chance they could go down. This way we have our secondary back up on TM.
We still require the scout to manage his own scouting career and paperwork, we just have a back up plan in case something happens (e.g., fire, flood, natural disaster, etc.). I never want to be in a position of telling a scout with 6 years in the program he cannot make Eagle because of a single or dual point of failure. Too much at stake.