Not true if people just choose to stop or slow their use of Facebook. Most of my friends there are barely active. I never use the app, only desktop with ad blocking, but still, nothing there is really interesting to me, so I'm rarely on FB at all. Across the web I never use it to authenticate, and if a private company asks me for any personal info, it's usually inaccurate info that I enter.

I have remembered a fake birth date, fake home address, and other details that I use for all these sites, unless they're related to commerce or legally justified purposes. We do not need to provide accurate info to private companies that mis-use our data (provided it is not required for our own reputational purposes).