Rockstar didnt make L.A. Noire, they only published it. It was developed by Team Bondi.
Have you ever played a Metal Gear Solid title? How about Final Fantasy? Did you ever hear of Watchdogs?
Granted Bethesda and Rockstar develop some great titles of have two of the most iconic franchises in gaming history (TES and GTA).
They are not the be all end all though, but that doesn't take away from their greatness.