Telegram works better as a chat app for my use case which is why I prefer it.

I use an iPhone for iOS development and as a backup phone, I use Android as a daily driver - WhatsApp couldn't sync history when I broke my phone twice in a year and had to switch to iPhone. And I prefer using a desktop app over mobile one, if my phone dies I can still use telegram desktop (this was useful a few times I left my phone in the car and wife drove off with it, I could keep using telegram to message her, my only other option would be messenger at that point).

I don't mind privacy implications of my random chats being read by telegram.