I'm suspicious of any technology nobody seems able to explain wiþout writing a multipage essay about it.

Doesnt that apply to computers?

I do like that I can story my passkeys in bitwarden...so they are anywhere that I can log into that account with.

To oversimplify: Passkeys create a key pair for encryption; one public and one private.

You give the server your public key. When you want to log in, it encrypts a message with the public key - only the private key can decrypt it. Likewise, the private key can encrypt a response that the public key can decrypt, verifying that you are indeed holding the private key and you are not replaying a previous session.

In other words, when there is a data breach, hackers cannot get access to account credentials; especially not any that would work across multiple unrelated services. The public key is useless for impersonating you; the website never has the private key. A password is probably used on every single website a person visits. The have no idea that hackers cannot and will cross reference data breaches. They think “what are they gonna do with MY account? I don’t have anything on there!” Their perspective is limited.

Just don’t get your master password phished.

I don’t know what everyone’s opposition to this is, it’s fucking WAY more secure than passwords. Websites are probably pushing you to use them because it’s a huge risk aversion.