The only reason this is true right now is that Skyrim has been out for a good decade and 2077 has barely been out for barely 3 and the pretty stellar mods that were/are out for it get broken every update.
In time when the game gets stable and modders don't have to worry about it breaking every month I think we'll start getting some deeper stuff. Right now some of my favorite mods are mostly adding things the game has that it loses over time - the metro to have passenger travel for example.
I don't know if we'll ever get the Skyrim level of map modding where you can grow your own weed farm but I definitely think there is strong potential there.
However in terms of broken games, I think Skyrim still wins. I still have the intro bug constantly, quests constantly fail to trigger, and while there are fun bugs there are really frustrating ones. I was able to 100% 2077 by my second save not too long after release and I only had about 3 major bugs through those - one quest I had to reload a save to complete which was the worst of them. 2077 actually gets more stable with mods lol.