I can only speak from personal experience.
We had whattsap as a family chat, first it was great for sharing pictures and video clips.
Loads of friends were on our group and we got dozens and dozens of video clips. Fascinating, entertaining and comical. I couldnt keep up watching all of them. I couldnt not watch them, they were so short and easy to just watch one after another. and then of course forward further.
It wasnt an easy decision to get rid of whatsapp. I justified like all of you, whats wrong, i can do good things with it etc….
We got rid of it.
What can I tell you, at first i was bored. I would look at my phone for entertainment, it didnt provide any. Now I see how addicted I was.