It is logically unsound to say that Scn/Dn is all bad. All is hard to prove.
I would say how much good and how much bad is irrelevant. It's like the communist party argue among themselves how much to blame Mao for the cultural revolution. They settled at 30% bad, which is pretty meaningless. Millions died.
I would think every course, or every piece of tech is like a honey pot, with varying sizes. For each pot there is always at least a small payload of bad things, like addictive drugs, or I would say a program to selectively peel off your rational reasoning. (Thought stopping is similar but sounds too simplified.) You can't accept the honey pot without moving a step towards being an absolute obedience zombie in some matters.
If you accept Dn, you have to accept that it's a science. LRH says so. You have to accept that you are worse than the Nazis, that 2% of the population can be removed without sorrow. And that homesexuals are aberrations. (It's not. Evolutions go in all directions and in all stages, doesn't have to explain itself in a millions years.)
If you accept PTS/SP then you will always find someone to blame, regardless whether you can prove it or not. If you accept that the 3rd party rule is basically true, maybe 30%. Soon it will be 100%, and whenever a person critizes Scn, you KNOW that the psycs sent him and he is an SP, that you can remove him without sorrow.
So I can't agree with the indies, unless you officially remove these payloads in all LRH tech. You will end up like the current CoS sooner or in a billion years. The guys you attract to Scn will be willing to remove 2% of the population silently without sorrow. Most likely they didn't think twice about it when they first read the book. But that's gradual peeling off in effect.
It doesn't matter when Marty says the Xenu story is a metaphor like genesis. Unless you change auditing drastically, people will end up going back to trillions and trillions of years to their previous alien life, long before they have the money to reach OT3.