Perhaps to some degree but Disney is a lot more invested in Aulani than the others. 300 cash rooms, 3 restaurants, wedding facilities, convention facilities. Their stake in Aulani goes much deeper than a couple hundred sold-out timeshare villas.
With regard to Vero and HHI, I don't disagree with Dean (much easier to envision those two sold off rather than a theme park resort) but I also don't know why
DVC would consider getting rid of them either. Aside from the management fees received, it seems like those two resorts add value to the DVC product as a whole. The resorts don't seem substantial enough for another manager to want to pursue the business.
Perhaps in another 32 years Disney will find another home for the properties but until then it seems like a case of no harm, no foul. Owners pay for operations and upkeep and they give DVC two non-park destinations to market.