Why are there so many incomplete profiles on this site? Are people afraid to post their careers or accomplishments?

my profile will never get to 100% completion because I don't choose to be a part of the major social media organizations like Facebook.

I still don't feel totally safe posting too much info on here because it is all public to anyone who googles your name or any of the subjects discussed on here.

It never was a thought in my head to bring my profile to 100%. I mean, what does it contribute to the community? (That's a genuine question) My name rank and unit are here. I don't and never will post my entire work/life history on social media, all that info about me just has no business on the public web beyond what is data-mined already. If it's more than someone can look up on MOL, RP certainly doesn't need to know it about me.