I don't particularly have a lot to add, but it does feel like studios are relying on modders to do the heavy lifting. I'm old enough to remember Morrowind not having the option to block on command, which lead to modders to the rescue. All of that got rolled up into Oblivion and Skyrim going forward.
It may be a matter of knowing that it needs to be happening, but not knowing the best way to do it. In a way, modders really provide a level of focus testing that AAA studios could only dream of.