Yeshiva is like being at Mount Sinai. You spend a year there in order to get religion, in preparation for what comes after. Leaving yeshiva like leaving Mount Sinai. You can't be eager to do it. Witness the midrash which castigates Israel for running away from Sinai like kids from school.
Your life's purpose is fundamentally in Israel not in the desert, and once you are ready for Israel, you have to go. But you take an aron and luchot with you. A little bit of Sinai remains physically close with the Jewish people, and a little bit of yeshiva must remain with you. Not only do you try do implement the ideas you learned in yeshiva, but a certain level you must feel that you never left.