Then what is the entire purpose of such services, if their providers still need to be blindly trusted?
I believe that it's a required feature by many enterprise customers.
Maybe that's why B2C-focused Standard Notes doesn't provide any way to recover your account if the password is lost[4].
But what is stopping them from adding such a feature in the future?
[1] https://support.1password.com/recovery/
[2] https://bitwarden.com/help/admin-reset/
[3] https://support.tresorit.com/hc/en-us/articles/216114497-I-forgot-my-password
[4] https://standardnotes.com/help/6/i-ve-forgotten-my-password-what-should-i-do