The author claims that everyone refers to Telegram as an encrypted messenger, but he only provides a single example to support that. I quickly checked Google News and couldn't find any media on the first page that did the same. It feels like a manipulation.
UPDATE: anyone who downvote, I invite to check for themselves.
Just a few known media:
1. https://www.aljazeera.com/amp/news/2024/8/25/telegram-messag...
2. https://www.washingtonpost.com/technology/2024/08/25/durov-t...
3. https://www.businessinsider.com/telegram-ceo-pavel-durov-arr...
4. https://www.theguardian.com/media/article/2024/aug/24/telegr...
However, indeed, I‘ve seen a few media that call it encrypted. This include France24, POLITICO, and The Times.