The grand canyon theory is normally incorrect, most of them lived in a normal distance around military bases (they were normally an hour or two away, normally if they give you a house close to them the distance is around 15 minutes) and most of their fathers had shitty normal military jobs because A. they had an history with the US military and after that they stopped going to them AKA most US men on that time B. they just lived with a father which was a military personnel, which is extremely common on the US.
Even then, the byrds and frank zappa where the ones with these families (Zappa with a closer history with them, doesn't make him an US controlled entity tho), frank normally showed an extreme disdain for the way the US army behaved:
“Government is the Entertainment division of the military-industrial complex.”
and the way it normally hated the way hippies behaved with we're only in for the money, calling them sold and goverment controlled.
A propaganda which tells you to not follow converted trends and saying to you that you shouldn't trust something is a very shitty puppet, even more when it recommends you to work hard.
Aside from this. The reason Kpop is so protected is because it generates a lot of money (this is done with food industries in the US) and because they are used as gigolos (man prostitutes).
The real deal with the MKULTRA was based around other things, music is very much a very limited art form and the feelings it generates normally are very subjective.
Even then, the reasons women like them isn't MKULTRA related, is just teenage hormones and wanting to fuck them, this happens with idols and porn in general, this increases because the material is given on extreme doses on all their media, even more because woman normally hide most of the physical part (they are more emotional, but the body still matters, men are normally like that too, but we have more enticing material to work with), if wanting to fuck is part of a brainwashing scheme, then it is a very underdeveloped system.