You never played the game. Most quests ARE fetch quests . And yes the factions do just boil down to corporations vs rebels.
One example is choosing Botanical gardens over Edgewater .. well nothing interesting happened . The only thing that occurs is all of the cannery workers in Edgewater are found standing outside protesting the cannery being closed down. Nothing happens to the CEO guy either. And Botanical gardens remains exactly the same too. Zero changes .