It’s a cat and mouse game for contact numbers. For example, Android’s Messages app can report all phone numbers of sent and received messages back to Google. You will never get millions of users to change which proprietary app they use for texting, so I do my part to have no numbers, no contacts, and never send a text message.
There’s why I do not have or use Contacts on phone. There is no phone numbers in my phone. I have a couple copies of a text file with phone numbers save on USB’s and I think a BSD server. There’s no contact info that apps can scan to get other people’s emails or numbers.
I’m suspicious that is code language for allowing opinions not approved to speak on the internet.