This debate really is pointless. You can't blame guys for not wanting to see girls that don't show their faces because they have been burned before and want to avoid it happening again.
Similarly, you can't blame women for wanting to retain some control over their lives. Once a face pic is out there, that decision will follow you forever.
There is no right answer here. Make a decision and be comfortable that you made the right one for you.
As for the OP, I've met her and FWIW I believe her when she says the only reason she hides her face is due to privacy concerns.