I actually think this offers the vacationer more freedom.
You could be right but the fact that people go there indicate they want that convenience and cost savings. There is nothing preventing them from staying at Zorba’s place and having a do it yourself itinerary. I believe it is more families where dragging kids around is a pain who stay at these resorts. These types of resorts are popular at other places in Mexico, and the Caribbean.
I believe that the biggest profit-maker in Greece is the island tours. They are great and the only places I know that have the gated all-inclusive hotels are on the outer islands. Not only are those island economies small, the hotels are the only real income, such as Kos. If this nimrod tries to mess with that, I believe the outer island resorts will seek to exist.
When you see how the “small businesses” screw tourists, you can understand the attraction of “all-inclusive”; nobody should pay those prices if they can avoid it.