c”v, I didn’t say that P’ru u’rvu is a lower level. I was referring to the idea that a person has to have as many children as possible, and I was saying that it MIGHT not be in the same halachic category as the Mitzvah of Kibbud Av v’Eim. The fact that they are both halachos does not mean they are necessarily in the same halachic category.
There are things that you are supposed to give others mussar for and things you aren’t. Even if Kibbud Av v’Eim is something that you are supposed to give others mussar for it doesn’t necessarily follow that having as many kids as possible is something that you have to give others mussar for (which was the topic under discussion).