Health, Rav Kamenetzky mentioned our being judged for not doing kiruv. He is a responsible Rosh Yeshiva, and you do not say such things unless there is a chiyuv. It is such a big thing that Eliyahu Ha’Navi brought a korban ba’chutz at the time of issur bamos to bring back wayward Jews. I am not going to respond anymore to your lack of Ahavas Yisroel-driven opinion.
M in Israel, you missed a major part in definition of Chilul HaShem. If a choshuve person does something which even appears to be wrong, and it becomes known, and people look down on it, it is a Chilul HaShem. The same applies to a frum Yid in front of Goyim or frei Yidden. It causes a lessening of Kovod Shamayim because people expect a level of perfection from a choshuve person/frume Yid.
PBA, it is obvious, and I also heard so from my Rosh Yeshiva that if the Torah says that a certain thing is a mitsva, it is within reach of every Jew to do it.
Cinderella, you do not need to tell her you are not perfect!