> I don’t quite understand what the point of telegram is then?
It's UX is far superior to any cross-platform competitor. On top of that, its client is open source and the servers have easy and free bot APIs. It also has channels, which broadcast your messages to followers and many secure competitors don't have such functionality.
It's not encrypted, but as it turns out most people don't really care about that in practice. If they would, texting wouldn't be popular in places like the USA. That's probably why people go to Telegram instead of Signal, ease of use is more important than privacy for most, especially in group chats that are generally about what's for dinner.