Who said anything about chas v’shalom creating a new mitzvah, which would be a clear violation of bal tosif?
As you correctly point out, those who love their tefillin are more likely to lay tefillin (and in fact there are men who have had the same set of tefillin for years and years, and prefer to spend more money on checking and repairing the same set periodically rather than purchasing a new set, because they are emotionally attached to that particular set).
Why then can you not admit that it is therefore worthwhile to instill in our children a love of Eretz YIsroel, so that they will be more likely to grow up and fulfill the mitzvah of living in Eretz Yisroel? Incidentally, whoever does this will have a share in that mitzvah even if he himself does not move to Eretz Yisroel, because he enabled his sons and daughters to do so.
I don’t think there are any social circles that literally conceive of “Ahavas Eretz Yisroel” as a mitzvah in and of itself. However, it is certainly a Jewish value for the reason mentioned above, and also because it is inherently a beautiful place (9/10 shares of the world’s beauty went to Yerushalayim, remember) and a precious gift from Hashem (and whether or not you believe that Hashem rescinded this gift, the fact that He gave it to us in the first place demonstrates that it is valuable and well worth loving. Don’t kids love toys they don’t actually own, because their parents won’t buy it or already took it away for bad behavior?)