Modding can be done, even by yourself, it's just not officially supported, which is why discussing it here is generally not a thing.
Frontier aren't against modding at all, but for this particular game, they can't allow official support because they have their hands full, with the help from Universal, to make the game look and feel as it does. Allowing official modding support means lots more work to do than what they may currently have, even at basic level.