It never fails to surprise me how some people misrepresent ogCale's sacrifice as him being selfish, when he was the one who literally lost EVERYTHING and gained crumbs from that deal.
Some people act as if KRS' transmigration was a malicious act on ogCale's part and not a consequence of the God of Death fixing his own mess. And who, let's remember, already screwed KRS over before through the White Star's curse (which wouldn't exist if it weren't for his vows of death in the first place).
I don't know if people really believe that the God of Death sat down with ogCale to have a nice chitchat and explain all the details of the deal. If so, they clearly skipped the flashback of Choi Jung Soo's deal.
The God of Death only explains what's convenient for him, and the deal proposal doesn't last long (because the person in question is usually dying/about to die, which was ogCale's case).
Negotiate? There's no time for that. You take the offer or you die, it's that simple.
ogCale's options were either to die and let his world be destroyed. Or give thousands of people a chance in exchange for transmigration.
It's obvious which of those two options is the best.
If you applaud KRS!Cale whenever he does bad things that will benefit others, you automatically forfeit the right to reproach other characters who have done/did the same thing.
The guy didn't go on vacation to live the good life and leave all the work to Kim Rok Soo. Rather, he was the one who lost the most here.
Kim Rok Soo received a complete guide that included context, important landmarks, important events, important people, powers, resources, inside knowledge (like the fact Alberu had an AP himself) and long details about the future, etc. And his new identity is that of a young master whom no one expects anything from, and who is the son of one of the richest families in the region.
OgCale, on the other hand, obtained incomplete memories and powers, just enough to adapt to his new life. Which is crazy when you think about it because Kim Rok Soo is someone pretty important (even though he denies it), and those are some big shoes to fill.
His mother? Although she was reincarnated in the same world he transmigrated into, the adoption was never guaranteed. Choi Jung Soo just gave him the address of the orphanage and left. He had to do the rest.
His decision saved thousands of lives, regardless of what was going through his mind when he made the deal. Not just his family's lives. Which, I remind you, had been dead for decades. And whom he will NEVER BE ABLE TO SEE AGAIN.
And yet, the only thing ogCale complained about during his meeting with KRS!Cale was the night shift, only to add that he would become CEO of the company to get rid of it.
He tells KRS!Cale to cast his name away not because he's an asshole, but so that KRS!Cale can move on and live his new life comfortably. Bro even tells him how to actually succeed in becoming a slacker.
He's working hard, taking care of KRS!Cale's team (as seen in the special), and even tells KRS!Cale himself that he will definitely save the earth so the other doesn't worry about it. Which part of that is selfish?
Not to mention that KRS!Cale wouldn't have saved anyone or have the family he has now because they would all be dead, and therefore the opportunity to be happy after a shitty life would not have come his way either.
