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
> Then what is the entire purpose of such services, if their providers still need to be blindly trusted?
Even if the provider doesn't have direct access to the vault key, you have to trust the provider at the moment you access your vault, because the server is controlled by the provider.
It must be someone else in that group to recover your account, the company themselves can't recover your account for you.
I found that those linked articles explained it pretty well.