Popa, we obviously know very different frum girls. Of course, they might be embarrassed – at FALLING down in front of others and being unable to stand, but they would welcome the assistance of ANYONE male or female, and the physical contact is very brief and for a tachlis. At the very least, the boys should have gone for help, and they could have ASKED her if she needed or wanted help. That would have shown they were not bulvanim.
No doubt we do know different frum girls. (I actually know both kinds, or rather, I know the kind you refer to, but I know of the kind I refer to.) And no doubt that the kind you refer to would be pleased to be offered help, and more pleased if she thought it was because she was pretty. (Which is the usual reason that men offer to help women do random stuff like reach high things in the supermarket or carry their suitcases, btw.)
But you should be able to understand that yeshiva guys are more familiar with the type of girls I refer to. Their sisters would be mortified if the group of guys has come over and offered to help.
Can you understand that please for me? Can you accept that please for me?