Lacrosse goggles are the norm now, but when I was in high school they were just getting started. The same issues were in play - the rumor was that college coaches didn't want a girl who wore goggles because she was more likely to violate the shooting space rule. The rule itself isn't important here, just the general resistance to change. Bottom line I do think facemasks will become the norm, it is just going to take time. It will be interesting to see what happens in the coming year as the California HS rule mandating facemasks is played out.
Got a link to verification of this rule? I have been all over the CIF sight and can find no mention of a facemask rule.