[robmcm]

Logging into a system that doesn't support your password manager, such as games consoles, shared computers, restricted work machines etc.

Copying over a really long generated password is much harder than an algo you can perform in your head.

[woobar]

Even worse - entering a password into a device without keyboard. Smart TVs, streaming sticks, consoles, etc. Extra fun when every input character is immediately masked.

[nikcub]

use KeyPassXC - it supports generating word based or readable passwords and you can set it as the default