Yichusdik, it sounds like we agree on the main issues here – namely, that one should only be involved in what you are calling macro-kiruv if they have many qualifications (you listed even more than I was thinking of! but I do agree with you).
Rebshidduch’s situation is a macro-kiruv situation and she should not be involved until she has some of the above qualifications. She should certainly wait until she has attended seminary for a MINIMUM of one year.
However, there is something important to point out. I attended an Aish HaTorah seminar at which the presenter made sure to deliniate the differences between Aish haTorah’s hashkafa and mainstream Yeshivish hashkafa. If you have been involved with Aish HaTorah, I am sure that you are aware of those differences.
If Rav Noach Weinberg zatsal was your Rav, then you can and probably should follow him. But please understand that most Frum Jews will and probably should choose to follow the mainstream Yeshivish hashkafa (if in fact there are differences).
Rav Noach Weinberg zatsal was a big Tzaddik, but I’m not sure that he should be quoted as though he was the Gadol Hador and everyone has to follow him.
In any case, I don’t think that anyone would disagree with the words that you quoted in his name. The only disagreement would be in their application. And I don’t know if we have any way of knowing precisely how he meant for them to be applied.