What are actual Delta Chat limitations?

adding a bot to your group basically means breaking encryption, the bot will have access to all the messages sent in the group, unlike in Telegram where the bot is added in a “privacy mode” where it only have access to messages with commands like /help or explicit mentions @bot do that etc, we really need something like that in Delta Chat to be able to enjoy bot utility without breaking privacy and overloading bots with a lot of messages