The point of this plot twist is to make hansol redeemable I think. If the Dr really did manipulate gaha, then that has nothing to do with hansol as he doesn't know any better and didn't do any of the manipulation himself.
Basically, this plot twist is to reinforce that hansol was a victim himself and his dad was the bad guy
I think so too, the author needed some scarp goat to take the blame,and show the white haired guy as the victim, even after all the shit he did, well i also understand the white haired guy to some extend, not bring able to live ur life as u wish. Your body being in control of someone else but still doesn't scrap all the shit both "father-son" dou did

You guys have to remember that the dr is manipulative, he maybe brainwashed the guide, so I dont believe the plot twist. One of the case that happen, is the guy (victim) who want to propose to his girlfriend (guide).