This is an interesting topic for me as my DD is coming from baseball. On one hand, "requiring" masks pisses me off. Why? Boys aren't required at all. So girls must be more fragile right? I'm not a 2nd or 3rd wave feminist in any way, but that mentality still bothers the living hell out of me. My DD HATES a mask on her helmet. I mean HATES it!
Welcome to fastpitch.
My experience on both sides is that I see more hits off the helmet in fastpitch as the primary pitch angle tends to be up and through the zone with the underhand release point versus baseball which is down and through with overarm pitching/pitching mounds. More balls come off the bat up and into the face in softball than baseball due to this, whereas in baseball I see more balls coming towards the head straight from the pitchers hand rather than off the the bat. Head hits are still uncommon - but less rare than baseball. Fielding wise, yeah corners and pitchers can be less than 30' from the bat - I have seen our 3B at 30' and charging to less than 10'. A fake bunt/hit is scary for corners.
That said, even in baseball I am seeing more and more of the extended flaps on batting helmets which frankly looks dumber than the cages. I have not seen a fielding mask in baseball except on a kid how has already been hit and been injured badly. But then baseball has always moved slowly on pretty much everything.
I am also of the 'parents can make their decision no matter how dumb a decision I think it is' opinion... what I can't stand is when parents try to justify it with 'little Susie doesn't want to wear a mask'. You are a parent - it is your decision. Don't pass the buck onto your child. It is not HER risk to decide to take - it is yours.
College - they can make their own minds up - but we are seeing that more and more are not removing batting cages or fielding masks as they got used to wearing them.
What do I think will happen? Well lots of equipment in mandatory in all sports for all sorts of reason including safety. I wont be surprised when it becomes a required piece of equipment.