Our chapter had moms and other relatives who did crafty things similar to what you are talking about. Upon meeting the moms, if they said they did {insert crafty thing here} and said "if you ever need anything, just let me know!" we would have been thrilled.
However, if the mom would have just barrelled in and tried to tell us what to do and why what we were doing was subpar - whether she was Greek or not - her information would not have been welcome. The LAST thing you want is for your daughter to be known as the PNM with the pushy mom.
And another thing is, that may be the campus style in general. I still can't believe hordes of beautiful young women are running around the south in Nikes and running shorts when they're not exercising, but such is life. Unless of course, you mean you browsed the NATIONAL websites of the groups and came to this conclusion, and then that's just a big ginourmous