I think that the meal plan would be nice for
DVC members, but I can see why it is not offered. Here are some reasons:
1. By encouraging people to book packages, they are ensuring that they keep guests on Disney property longer. This leads to higher resort fees, souvenir fees, and park admission fees. DVC members are not on "packages" and have prepaid their resort fees through the membership.
2. They recoup their money on the dining plan by being able to charge rack rate for the resort rooms. They would not be able to do this for DVC members.
3. The dining plan is a way to entice more guests to visit Disney. When you commit to DVC, they know they have you for 30+ years, so why do they need to entice you further.
I don't think it is a question of fairness, like it or not, Disney can do what they want. I do wish they would offer the DDE card to DVC members. That would be a nice perk. We were able to get one because we have AP's this year, but we may not always in the future.