Nothing delusional about it. Ion said that Dragon Riding will not replace mounts in the Dragon Isles. They also said that flying will not be locked behind a achievement. They also said there will be objectives that can not be reached with normal flying. That seems to say that normal flying will exist. They said existing mounts will not be invalidated.
There is nothing wrong with flying and I think that, going forward, some of the mechanics of Dragon Riding will be incorporated into flying in general. Your anti-flying bias is clouding your vision.