Earlier quoted context omitted.
Collecting intimate personal details and selling it to advertisers is less ominous than screening apps to ensure quality?
For that the key is the privacy controls. We can argue about whether Facebook's privacy controls are good enough, whether they are selling our data, and so on. But that's got nothing to do with the Apple walled-garden comparison. I can write a FB app and have it up in a jiffy, that's just not the case with Apple. And I will be so very very surprised if Facebook censors a dictionary app.
If FB doesn't like your app they'll have it down in a jiffy too. It's not nearly so clear cut as you make out. Their review process is just reactive instead of front-loaded.