[AdrenalinMd]

>They can't. The messages are encrypted on the servers and their keys are split between multiple jurisdictions. No engineer can decrypt messages.

You really don't get why E2E encryption is necessary, do you?

[NayamAmarshe]

Telegram already has E2EE, if you want to use it and the algorithm is well audited as well.

E2EE has obvious flaws, mostly related to feature-set. Cloud sync is difficult with E2EE, as well as managing chats with thousands of members. Telegram is more of a social media with a great convenient messenger. It doesn't make sense for it to be like WhatsApp or Signal. Those who use Telegram know the difference very well.