Chill, you’re not the only one here.
VoIP in a mainstream messenger is something that most people use nowadays to avoid calling people from their SIM cards which costs them much.
Video calling too is something I personally use too especially on iMessage or Telegram.
I’m a software engineer, I appreciate some old school things that work perfectly well like ICQ or Vim or emacs or working only with shortcuts. But you know what’s also a shortcut? Not having to use 50 different messengers just because this one doesn’t have VoIP and I can’t bring my friends or my mom here but I can bring only my nerd friends”.
This is all business and target audience oriented. You are not the only target audience out there and especially when you don’t demand from a messenger to be able to have VoIP. Even Instagram has VoIP these days. A photo-video-media sharing app. Let alone a messenger.
I talked about various audiences not just myself. The person I replied to talked as if the app was made for him explicitly. “VoIP is not something I’d care about, file transfers are” like this kind of talking is like bruh, the app is not made only for you.