What's so scary about having a conversation with everyone that does it and asking them personally.
Does anyone have that kind of time?
Why not?
You can have the most filled out and honest profile in the world.
Doesn't mean anything if no one says "hi" to you, or answer your "hi."
The more filled out it is, the better chances are you won't look like one of the many bot/scammer accounts. If you state something about revealing things due to privacy issues, most people, I would image, would consider that perfectly fine, but when there's nothing, there's no ability to tell if they're a real person or not.
It's neither good nor bad.
It really just doesn't matter.
It really kinda does. No one looks at a blank profile and go "Oh, this is interesting!" No one.
I can see the benefits of just saying "hi."
IMO it seems kind of like seeing someone in public and starting off with "pardon me," as opposed to immediately going into a routine trying to force their attention, or screaming at them "this is me! this is everything about me! validate it! commit it to memory! Now!"
The problem is that with that 'hi' in the profile because it's the default, you end up looking like the many scammers out there, who do not bother to fill out a profile. The people who talk about safety and so on sites like this warn specifically against profiles with little to no information. They're the first sign of a potential predator, scammer, or worse.