I think the larger issue there isn't the ability to selectively edit memories, it's that we as people haven't come to accept what we as people are. We're fragile, and every act of recollection opens a memory to editing. The thing is, if you're educated about these, trained even, you can simply resist or ignore them. They are not magic, not a "power". They are powerful because they are stealthy, because they can be used in ways that are made to be egosyntonic. "You have bad breath, no one will love you, use Listerine." That's really powerful, until you know the principle behind it, then boom... zero engagement.
It's always been, and will always be a war for our minds, with education being the only real defense. The point of mind 'CONTROL' over influence though, is disregard for the individual. For example, torture works if you don't care about it working on any one person. If you're only interested in meeting some quota, with endless raw human material, time, and resources, you can torture people as a group into just about anything. The Chinese produced the illusion of "Brainwashing" this way, in Korea.
The dirty secret though is that like the swan, a lot goes on beneath. For one, most people you torture, around 40%, simply won't break. There are a ton of reasons why this is, and we don't need to get into them here, but the point is that if the state needs you Paul H to confess to your "crimes" (and not scream "I'm being framed!" on the stand at your show trial) there is no way to do that now. There's a way to make a certain number of people in a group, some of whom will die, be crippled, and lose their minds, do it, but not just YOU, not reliably.
If or when that changes, our society is going to change. Why try to manipulate subtly what you can control outright? Our lives are relationships built on exchanged influence, but what if that didn't matter in the face of some absolute control? Not a tendency, not a high percentage of compliance, but total control? I think that line matters, because it changes how people relate to each other and governments relate to people. For one, killing people becomes an insane waste of future resources, a future slave waiting to be made. For another, once someone is under your control you don't have to have any concern for maintaining their state of servitude, there is no risk of your system being unstable like any slavery-based system.
Finally, and most critically, if you can control minds you can do so in a way that hides the fact of what you've done. Yes, I know that you can kick down my door if you want to and rob me, but I will know that my door has been kicked in. If you pick my lock, you can enter without my knowledge. If you can pass through walls...