Isekai Yakkyoku

[Kraco]

The father already noticed something is very different. And to pull your argument around: Only a loveless father wouldn't notice when his son suddenly is a completely different person.

He did notice, but he also could accept Farma's explanation after the lightning strike and seeing the magic crest. It's a religious and superstitious society and culture. At the end of the day, the old man would obviously have nothing against Farma being divinely inspired to develop medicine by leaps and bounds, theirs being a medicine family, after all.

His real son is dead, that's fact. Or at least he's gone for now. While there is some risk to how it'd end, the positives far outweight those: being able to live with this family without guilt and working together. Neo-Farma could talk it all out with the father, even saying that maybe there's a way to restore the original son and that he'll help finding a way, if there is one.

The family doesn't believe their son is dead. They can keep living happily. This very episode addressed the issue of how to approach patients, and Farma noticed that's where he's lacking. He can't do things considering only his own feelings, ambitions, or goals, the well-being of the patient is the most important thing, and that includes the psychological aspect. There's absolutely no morally right or wrong stance in this question, so the more important question would be what is best for the family. Hearing their son is dead and the should-be-corpse is controlled by some alien entity would hardly be the best thing for them.

It's quite outlandish to think Farma could keep living there with the family if he revealed how things really are. He would have no bond to de Medici family anymore, in fact it should be too painful for them to keep seeing him. "Finding a way" could happen, but why go through all the pain when it doesn't, in the end, serve any purpose?

Right now, Neo-Farma is full on lying to the father, but feels as if he's being nice and all, when he's not. There's nothing nice about telling someone his dead son is actually still alive when he's not. You gotta rip the bandaid off.

No, he actually said he considers himself Bruno's son. There's a technical difference there, if you want to pay attention to it, which means he's not full on lying. It's not like the Japanese dude wanted to be reborn as Farma, so he gotta do nothing at all. Like every single human's, his first priority is to look after himself. It just so happens that by looking after himself, he has a chance to look after millions of people. If you really want to find someone to blame for the situation and accept responsibility, blame the deity Panaceia, or whatever it was.