ngl I do believe you are right XD. In documentaries and the actual mk ultra documentations, mk ultra is a very strenuous process to get the results that they want. Such as multiple personalities. It probably takes 6-months at least to get the results that they want and that is through some serious LSD and rewiring their brain while they are sleeping by playing some type of audio that is telling them something over and over again. Also when the patients were on LSD they couldn't do anything. They were paralyzed, they couldn't see, or move. So I don't believe that kpop idols have went through a mk ultra like scenario at all.
https://info.publicintelligence.net/CIA-MKULTRA-IG.pdf ( here's a pdf that talks about the mk ultra experimentations, but there are a ton more out there. Yet its still pretty interesting so if anyone wants to look at it here ya go its 42 pages btw XD)
However, I believe a more realistic scenario that is happening is a simple human trait that everyone possesses but it grew and over took them which is greed, and the need for fame. Everyone has a small desire in them to have more money, more materialistic things, and especially more attention. So this need for money and attention grew so much they are latching onto it for dear life that they will never let it go and they will do anything to keep it out of desperation.
For the love of money is a root of all kinds of evils. It is through this craving that some have wandered away from the faith and pierced themselves with many pangs. (1 Timothy 6:10)
He who loves money will not be satisfied with money, nor he who loves wealth with his income; this also is vanity.(Ecclesiastes 5:10)
It also didn't help that during the vulnerable ages they entered the industry the only adult figure they really had at the time was Bang pd. Who never denied how greedy he was and still is.
"To Jin, Suga, Rap Monster, J-Hope, Jimin, V and Jungkook
When I first met you, all of you were so young. I met you all at different times, but all of you seemed to be scared at something. Like you didn't know how to look at me, you couldn't look me in the eye well at all. I feel that I really pushed you boys a lot. I had a lot of greed and put you under my standard.
I gave you a hard time asking why you couldn't believe yourself and why you weren't trying to look far into the future.
I'm sure all of you remember losing sleep over this...because the place I pointed to was too far and dark. Even so, you always somehow found that path and further up than the place that I pointed to. As I was walking with you I finally realized it. Your anxiety was another face of desperation. That's what pushed you to practice until late at night, to go against everything going over the limits on your own. But now a step back, I can see you getting better and better.
Because there's no reason for me to raise my finger and point towards a place.
With your own strengths, you are finding your own paths. And you are passing the places that I didn't dare looking towards. But still, thank you. I won't say that I'm proud of you just yet because I am a very greedy person. Let's hold onto that until the day you become
the best group in the world
on June 12 a year no, 3 years later. On that day, I'll look each of you in the eye and tell you personally from my lips. That I'm thankful that you stayed by me and for bringing me here and allowing me to dream.
I write this on May 2016, a month before your 3rd anniversary." - Bang Si Hyuk
https://aminoapps.com/c/btsarmy/page/blog/bang-pds-words-to-bangtan/06M1_g63UkuK0wbMpYqJNkGzY83Rxdp6nr1
However, I am not necessarily sure where all of the symbolism came from to signify mk ultra, or multiple personalities originated from.