People have a choice how to use technology. Just because you are able to send mass messages/videos/pictures does not mean you have to.
I’m an app developer and I don’t use whats app. I never had a desire to be a part of it. I use google chat, txt, email, and phone calls to communicate (probably in that order).
Being addicted to anything is unhealthy, whether it’s Alcohol, WhatsApp, Video games, YW Coffee room, etc…
To address the OP, the Gedolim did ban texting in the past. But as with all bans, they fade over time. (I saw an old ban regarding cassette players when they first came out). Now Whats App is the ‘thing to ban’. Give it a year and WA will be ok and the next thing will be banned.