I've done LFR rarely over the past couple of years but each time I did it was extremely toxic, with players just abusing each other and many people afking, refusing to play mechanics etc. And since it's matchmade you can't do much about it, votekicking takes forever and then you are effectively punished because you need to wait for the group to fill up again.
LFR should be for seeing the raid, not having to deal with toxic randoms. Replace all other players with npcs and make it entirely a story mode, where you can't fail.
People who do LFR don't want to wipe. And they don't wanna be flamed or badmouthed by other players they did not choose to group up with on purpose.