You couldn't be more wrong. I've lived in Czechia, Poland, the Netherlands, and the UK. I've played go competitively at a European level and have travelled a fair bit and socialized with nerds all over. Name a European country, chances are I know several people there.
How far east are you?
I'm from the Czech Republic and often spend time Poland. No one I know forces me to use WA or Telegram, everyone's either on G Hangouts or FB messenger.
SMS/iMessage is always everybody's first choice for communication here, i wouldn't say whatsapp is the dominant communication platform or used for in-country communication on a regular basis, but everybody seems to always have it installed or if they don't have it installed they know about it and are willing to install it.
What is this, 2010? It's all about Discord now bb (who refused to be bought by Microsoft BD)
I think that makes plenty of people on HN hesitant to adopt those
I recently went on a vacation with friends, 4 other folks on iPhones and me on an Android. Our group chat experience almost made me consider getting an iPhone. The inability to do emoji responds, and the fact that shared videos always looked like shit on my phone were just 2 of the examples. And I'm well past middle age! I can imagine what it feels like to be a high schooler or young adult feeling like the reason the group chat experience is sucking is because "you're the one with the Android".