I never said that Telegram is secure. For really confidential communication i would use encrypted emails, xmpp etc.

But: With Telegram I can choose which client i can use. Whatsapp has blocked our Harmattan / Sailfish / Maemo clients every time, they banned me for using non-conform client. So this is no go for me.

Telegram might be a bad, insecure messenger, but they are much more sympathic to me, than WA. And the fact, that Roskomnadzor banned them in RUS, makes them one more time sympathic to me