Sorry it’s not easy to keep track of the posts.
You are saying, if a person goes into a gvir’s house and demands that he be supported so that he could learn, that is a chillul Hashem.
Here is the Chinuch:
????? ??? ?? ???? ????? ??? ?????? ????? ??????? ????? ???? ?? ????? ????? ???? ????? ????? ????? ???? ???? ???? ???? ???? ????? ???? ?????? ???? ???? ???? ???? ??? ?? ???? ???? ???? ??? ??? ???? ??? ??????? ????? ??? ????? ??? ?????? ??? ????? ?’ ????? ??? ????
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As you can see, the only example he brings of an ish gadol doing something unseemly as a chillul Hashem is when it comes to a maaseh heter. However, we are talking about a mitzvah not a maaseh heter.
I would say the same applies to having children. We aren’t mevatel mitzvos for the sake of chillul Hashem. It’s not a chillul Hashem when the question is a mitzvah. If you have any source that says otherwise, please put it on the table.
Barring that, I would say that in the case of someone barging into a gvir’s house and demanding to be supported, that no, he hasn’t made a chillul Hashem.