What security researchers ? People here are normal users.
The developers work a lot, so obviously they don't have the time to come and answer everyone here, on discord, element, etc, they're very busy. And they're not supposed to know everything either.
This is a forum, not a customer service department.
Passwordless login is often an alternative method of logging in, not a requirement. Most sites don't offer the option of deactivating the password. This problem (which is real) has nothing to do with GrapheneOS.