I currently have 75 different accounts stored, each with a unique 16 character randomized password. My memory cannot handle remembering each one alongside their username and which service they are used for. I don't think it's reasonable to expect anyone to.

You are not required to secure passkeys with biometrics, you can just use a password to encrypt them if you want, removing the possibility of forced unlock.

With that many logins, I use a password manager anyway. Regardless of whether I use passwords or passkeys; that is always going to be target. With passkeys, that manager+my device are only possible targets to gain access to my accounts. With passwords every service is also a target, along with every connection I make to that service.

A random example: If I login to twitter with a password using a work computer, that password is more than likely now sitting in a log file on the corporate firewall that performs https inspection. That could be used to gain access to my account later.

Replace that password with a passkey, and now there's no ability to harvest and use login info from those logs. All they saw was the passkey challenge and response sent back/fourth with no ability to replicate it later.

While yes, you can usually recover you passkeys with a password and the appropriate access to the systems where they are backed up; the difference is very rarely using a password as a recovery code, vs using a password regularly giving much more opportunity for it to be intercepted or mishandled. The systems my password manager backs up to are also my own and not publicly accessible. (you don't have to use google/apples managers)

Also the passwords used for account auth are stored in my password manager, where as my password managers password is only stored in my mind. One is easy to remember, 75 is a bit much...