Because it provides no advantage. TLS is used to secure any data sent to a server. If you don't trust the server with your password, then you should use a unique password for this website. In fact, you should always use a unique password.
https://www.cloudflare.com/en-ca/learning/ssl/transport-layer-security-tls/
You are describing TLS, which is commonly used for websites and web apps.
Try the following command:
The public key, the authority that signed the certificate, and the cypher used will all be visible.
For me, the cipher used is
ECDHE-RSA-AES256-GCM-SHA384
.