[htaunay]

Many businesses already have WhatsApp as the exclusive channel of communication. So its either have a Meta account, or become locked out of a subset of services. Not to mention how many work/social groups use also WhatsApp exclusively. To try to force everyone to use something like Matrix is an herculean task, which also requires maintenance.

And then there are all the government/school/work/authentication apps that are mobile only and exclusive to iOS and Android.

IMO its impossible to walk away from it. The ship has sailed. It is possible to move away as far as you can and keep these accounts and their usage to a minimum, but its time consuming and has little rewards against many obstacles. Atm I'm willing to put in the effort but I also totally understand it not being a reasonable option for most.