DOs are ALREADY non-existant, Edison so you might want to check your source!
COs here in Spain regularly miss visits to congregations, both in the English and native Spanish congregations as they don't have enough time to visit the whole circuit apparently.
It wouldn't be a loss for me as many of them are just drunk on power and do it for all the perks (gifts of money, holidays etc.)
I asked our CO how he and his wife justify not visiting the congregations on the Saturday field service around assembly time because he has to supervise the demonstrations/interviews on Saturday mornings? He didn't like it when I said that field service with the CO wasn't that important then so I won't be encouraging the flock to attend the field service groups if they can't even be bothered to attend! I then quoted his own book to him (chapter 10, point 2) which says that he shouldn't allow other commitments to stop him from participating in field service on the weekend with the brothers. This quickly prompted him to ask how I got hold of that information so I just told him "an ex-Co friend of mine told me". Not lying... theocratic warfare!!!!
Needless to say, I'm now on his blacklist!!!