I guess if all you have is a hammer, everything starts to look like a nail. All we have is cargo scooping, scanning and shooting, therefore any mission Frontier designs has to fit into those woefully limited mechanics... somehow.
Exactly, and this is why Elite desperately needs expanded core exploration mechanics, because without them as a basis to develop from and utilize, no new content for explorers will ever be able to improve the gameplay of exploration. A wider range of tools would enable so many possibilities with future (and current) content that are just impractical or impossible with the tools we have now.
Imagine playing Minecraft without Enchanting, Redstone, or Farming. The core mechanics of a game are what allow the game’s content to be expanded upon, it gives the developers the framework with which they can add meaningful content to a game providing the diversity and interactivity of gameplay that makes playing a game “fun”. Without a solid core of mechanics to build upon a game becomes shallow, repetitive, and feels empty. This is where exploration in Elite still is today: neglected, underdeveloped, and empty of meaningful gameplay.
Imagination can only go so far towards filling that gap. Eventually, a game needs to actually have gameplay in order to be fun and rewarding.