It's just not graphical interface that is needed. If the devs don't let the mods access to some parts of the game, some things won't be possible like in Kerbal 1.
Kerbal 2 need to have all accessed by a complete API to be able to mod all the commands in the mod.
I have no problem to have it in a mod but devs have to do a job in order to have a complete mod not just a part like in Kerbal 1.
In Kerbal 2 it will be easier to have multiple bases in multiple universe.
Imagine if you have 10 bases in 10 different universes with life support, etc.
How could you manage all the supplying, refueling, etc without any AI to do this for you ?
I want to be able to code this in order to do others things in the game like exploring the all universe for exemple or creates new bases otherwhere.