The lore has never stated that they've done anything with their abilities over than move the ships that they live on. By your logic every psyker ever that hasn't explicitly been said to be doing otherwise is mind controlling everyone around them.
>GW introduces a new faction that's intended to be an optimistic, yet naive force in a grimdark future
>fat whales scream from the rooftops that this faction is ruining 40k with their lack of grimdark elements and stamp their feet at has as they can
>GW responds by introduces grimdark elements in the 6th edition
"this wasn't done due to fan outcry"
ok
So what if they did that? What's the problem? It's a grimdark future remember. Not every acquisition of a world happens that way and it's still better than what the Imperium does when it decides it wants a world.
Oh boy, they have an ineffective governor that doesn't actually do anything except for horde all of the resources for themselves and leave the rest of the people in poverty and squalor. Such an effective and lovely representation of the Imperium of Man.
You see, that's false because then you'd have to be an exodite. For the average person becoming one of the Gue'vesa is the best to achieve a satisfactory standard of living.