this benefits few and violates the privacy of millions… can we get a some fckin privacy laws yet

If you gave them permisison isn't that on you?

iOS you can

(1) Choose no permission - Then, if you want you can go to your photos in the iOS Photos app, select a few, pick "Send to App -> Facebook" when you want to give Facebook a few photos

(2) Copy and Paste photos

(3) Choose "only selected photos" - In this case, in the Facebook app, you choose to add photos, the photos you previously gave the app permission to view appear and there's a button "Select more Photos". You can pick that and select more. I use this option peronsally

(4) Choose "all photos" - I give this permission to Google Photos since I use Google Photos to make all my photos visible across all devices.

If you choose 4, that just seems on you. You told them they could access all the photos.