Of course, MW13 we know that. But right now we live in THIS Olam, presumably we will not see Gan Eden until after 120 years. the idea is that we have to make the best of the world we live in, and live in such a way as to merit Olam Haba. we also have to recognize that we are in this olam to enjoy its beauty, not to deprive ourselves of that enjoyment. As long as we do so while following the Torah, it is what Hashem wants.
Re: korbonos – Of course hashem has no need for our korbonos. They are strictly for our own sake, to remind us of our Borei, and the Makor of all that we have. I had ateracher once who was a terribly messed up person from having lost his entire family to Hitler, in front of his eyes. He came from rabbonim, and his name would eb well-known to some of you. He once made a comment in class that G-d needed the “rayach nicho-ach” of Jews burning in the ovens, just as He needed the burning flesh of the korbonos.
Of course, he was being incredibly disrespectful of Hashem, and I called him on it. I told him that G-d does not need our korbonos, or anyone else’s. He needs for us to bring those korbonos, in order for us to recognize that but for His grace, WE could be the korbon, and that sometimes many of us deserve to be by virtue of our actions, and sometimes some of us end up being korbonos because of the actions of others that result in “collateral damage.” (I did not use that actual term, as it was not in use when I went to college, but I got the idea across). My teacher called me a “pompous ignoramus,” but for some reason gave me an A+ for the course. Go figure.