So, according to R’ Moshe, living in EY is like doing chessed or tzedakah or eating in the sukkah when we don’t have to? I accept that. Yet all of those things, we don’t use the fact that it’s optional as an excuse. Do people really say “I don’t do tzedakah or chessed because it’s optional? I only eat in the sukkah the bare minimum because it’s optional?” And yet, R’ Moshe’s teshuvah is a reason (or an excuse) not to move to EY? We do chessed and tzedakah even when it’s really difficult because they are good things, even if they are not obligatory. Why is our attitude towards the mitzvah kiyumis (according to R’ Moshe) of yishuv Eretz Yisroel any different?
I guess the only reason not to go, at least according to R’ Moshes’s teshuvah, is if it were in fact too dangerous. But in my opinion, danger is an objective halachic status. So unless the millions of Jews already in Israel are violating venishmartem for every moment that they are in EY (and I don’t think any posek would go that far to say that they are), then it is not too dangerous to go to EY. I don’t understand what R’ Moshe seems to say that danger is subjective.