We all know if gear was removed from raids, no one would do the raid at all unless it was completely faceroll.
If you must have a raid all decked out in Rakata before attempting EC storymode, then you have effectively removed the gear carrot from the raid. While some raiders will spend some time in there to see the sights and experience the wonders, that quickly wears off when silly mechanics operate in strange ways - like having 3 lightning spires spawn inside the bombardment shields on the tank bosses.
I am in a fairly hardcore progression guild, I am sure we would do the raids whether they dropped loot or not, it is a different mindset.
That being said, my post was obviously sarcastic. The masses must have loot rained down upon them to remain happy