I didn't say you had to accept it. But it would be nice for Marco if you could understand that this place and your world, from a phoenix point of view, aren't that different. At least not regarding how it's all reduced to how many people we hold close to us and how fast we lose them while trying to get new people, because without that then we will have nothing. The things you see happening here, are going to happen to him to a very similar extent back home.

Don't think that just because right now back home he has something else to do, to watch over Luffy and make sure he survives and reaches his dream and all. Marco's existence eventually will go down to be just like the existence he has here. A life of seeing people enter his live and leaving, while only he remains and can do nothing but hope for some vague end to arrive. Unless he's lucky enough for his devil fruit's weakness to work enough to actually kill him and stop him from returning if he jumps to the sea.

[Here or there, there's suffering only awaiting for them in the long run.]

I understand what you mean, but there's a difference between rejecting and fighting something that you don't get and doing the same with something you at least understand. Until then all we would be doing is waste time and energy. Marco's way of fighting it may not be what you approve, but trying to gather as much happiness as possible so it out weights the shit he has to deal with, is still a way of fighting and rebelling.