A group rarely wants the same thing. Interest lanes let each person filter to theirs - while the plan still surfaces the shared core everyone agrees on.
Divers see dive sites, foodies see food, hikers see trails - each member browses and adds to the wishlist from their own interest.
Manta highlights what overlaps, so the group anchors on the things everyone actually wants to do together.
Everyone marks what they want; the plan converges on the group's real preferences instead of the loudest voice.