Rabbinic prohibitions in place of Matzah

Saying something to a non-Jew is possible (and there is debate about that too), but the prohibitions of the rabbis are not, in a blanket sense. Otherwise, why is the permission of saying something to a non-Jew required by the rabbis (returns of the rabbis instead of a necessity or a mitzvah)? As for your question about the prohibition of extinguishing or saving money, I think I have commented on this here before. In that case, the Rabbis created a prohibition that from the beginning stands in the way of these permits, meaning that it was not lifted in a place of great need and loss. It is like a clause limiting the permit of the prohibitions of return in a place of great loss. The more difficult question is not halakhic but practical: it is clear that people will not abide by this prohibition, and will not lose all their wealth because of fear of the rabbinical prohibition (lest it be extinguished, when extinguishing itself is a matter of law). What is the point of ruling on this? Moreover, the prohibition is based on the fact that a person is in a hurry for his wealth and comes to extinguish it. A person is even more in a hurry when it is forbidden to extinguish it and therefore will come to violate this prohibition itself. And we have already found this with regard to the removal of the dead (in the case of King David). Furthermore, Toss Shabbat 4:1 writes that it is impossible for there to be a prohibition on removing the loaf of bread that has stuck in the oven because people will not listen to it (a person will not offer his soul to be stoned because of the rabbinical prohibition). This is also seen here. I once thought (see columns 293 and 358) that it was possible that this was just a declaratory prohibition that came to educate us about the importance of Shabbat, but they didn't really intend for it to be observed. And in fact, the poskim limited it greatly, but instead resorted to hysterical expansions of the fiqun, as poskim do in these cases (and I emphasized this in my columns on public fiqun 529-531).