There might be things Meta isn’t allowed to do with WhatsApp. Also the concept of account is bit blurry on WhatsApp because you basically login with your phone number and an SMS code sent to your device. This wouldn’t work as well for a service that can be used elsewhere.
For me it is Fedora as well. Before that I was using EndeavourOS but wanted to use something a bit more stable. Haven’t distrohoped since!