you can disable background updates, wifi and mobile data, location, etc. which renders the app useless. They cant collect directly from the phone that way.
I have one app for all my messaging needs. No need to switch
i will always ask for matrix communication first which takes meta out of the loop
i have friends who arent tech savvy or ready to switch so I am not forced to use whatsapp
its a fun exercise and I provide feedback for the makers of the bridges which helps development