oomis:
Derech Hamelech, there is more kedusha in both parents attending their daughter’s granduation and ELEVATING the occasion to one of kedusha, than trying to eliminate an entire 50% of parents from attending. What if the girl HAS no mother? What if she has NO female role model that will stand up when she walks in and clap for her with nachas?
How are you defining kedusha? Kedushah comes from the word to “separate”. How is there “separation” in your proposal?
The way to “ELEVATE the occasion” is by making it “separate” and by extension kadosh.
Your case of a girl who has no mother is not a way to make a rule. Most girls that are graduating have mothers. In extenuating circumstances, where one or two girls in the class don’t have a mother a school might be convinced to quietly bring in the father and have him sit off to the side behind some sort of mechitzah.
But you can’t make a rule that sacrifices all the fathers’ ruchniyus for the sake of one or two girls.