I don't believe a mommy-type or CG has to be a DL to provide care to an AB or DL. What they do need to possess, as I wrote in both Sitter Search and Tender Loving Fun, is a wealth of actual childcare experience. In other words, you don't have to 'be' an AB or DL to understand the importance of, say, diaper checks ... assuming you've spent enough time around 'real' infants and toddlers and have developed the habit of checking diapers periodically to determine whether a diaper change is necessary.
For many of the women I've had babysitting me over the years, adapting their infant caregiving experience to a 'big baby' was a challenge ... not because they did not know what to do, but because of the mechanical issues involved. Once the physical challenges of 'babying' an adult have been mastered, the care provided pretty well translates, assuming the mommy or CG has a good deal of 'real' baby care experience to draw from.
In a broader sense, believing that a prospective caregiver or mommy needs to be an AB or DL herself would be horrendously limiting. Searching for a babysitter would be infinitely more difficult if I believed that an AB or DL personality was required.
