Yeah they probably add it in some new games

do you work at valve? because i would rather believe what they are saying.

"We understand our own game's communities pretty well, but stepping into an established, years old modding community in Skyrim was probably not the right place to start iterating. We think this made us miss the mark pretty badly, even though we believe there's a useful feature somewhere here."

In other words, not a good idea to implement the feature on a already established game. Paid mods might be released on upcoming games instead. Ones without an established modding community already built.