1) It's irrational. Facebook as an advertising platform is likely much more effective than what you will gain by crunching the limited data collected through apps. Googles advertising platform has other data points than Facebook but is equally potent in targeted marketing. However the biggest irrational hypocrisy in this shitstorm is that TV ads has always been known to be very effective in influencing elections yet no one has tweeted #deletetv.

2) Since Facebook, Messenger and WhatsApp are all 3rd party apps on Apple's platform, you just proved my point. Though I'm not sure you intented to?