Joseph- I don’t know how to value even one Jewish life vs. the mitzvah of yishuv Eretz Yisroel, but I do know it’s more complicated than you make it seem. Besides for historically, we have fought for yishuv EY, from the time of Yehoshua, to the time of Malchei Yehudah, to the time of the Chashmonaim (which was without the directive of a navi) which put Jewish lives at risk… the meforshim say how the mitzvah of yishuv Eretz Yisroel is both living and conquering Eretz Yisroel through war. By definition, yishuv Eretz Yisroel/milchemes mitzvah is docheh pikuach nefesh, otherwise there would be no such concept as yishuv Eretz Yisroel/milchemes mitzvah unless you were sure no one would die which is a ridiculous hava amina to even consider.
So, I think it is a very erroneous conclusion to say that yishuv Eretz Yisroel is always pushed aside for pikuach nefesh. It may be true nowadays, depending on the status of Eretz Yisroel, the mitzvah of Yishuv Eretz Yisroel, the concept of milchemes mitzvah bizman hazeh… but depending on how you understand those concepts, it is perfectly feasible for people to be put at risk for Yishuv Eretz Yisroel within the confines of Halachah.