Takahm, your attitude puzzles me.
I’m curious how much time you’ve spent studying the issue.
The source of the Mitzvah is the passuk in Parshas Masei (Bamidbar 33) where it says “Ve’yishavtem bah.” Right there it begins with a seeming disagreement between Rashi & the Ramban.
There is also a lot of discussion by those who came after him as to why yishuv Eretz Yisrael is not in the Rambam’s list of Mitzvos.
There are poskim who discuss the Gemara in Kesubos about a husband or wife compelling their spouse to move to Eretz Yisrael, what the halachic ramifications are, and how all this connects to the Mitzvah of yishuv Ha’Aretz. (I think it’s the end of that part of Kesubos that ymbyi quoted to us. And just as an aside to ymby- when you want to quote something like that, please tell us the exact source of your quote. Some of us don’t know pages and pages of Gemara by heart.)
Questions arise as to whether the mitzvah of living in Eretz Yisrael is just a part of being able to observe the mitzvos ha’teluyos ba’aretz.
I think there’s even one opinion that the difficulties in observing the mitzvos ha’teluyos ba’aretz make it inadvisable to live there!
It’s not a topic that I pretend to have a clear or (anywhere near) full understanding of, and I wonder if you think that you do, takahm.
I don’t think anyone will argue with my saying that the Rishonim and Acharonim that analyzed all of this are NOT people that you can refer to as being incorrect.