Earlier quoted context omitted.
Because you can store non-passwords in there too. Secure notes, your own signing certificates, keys, root CAs, and specific self signed certs you've accepted for SSL.
Still, none of that means anything to the average user. Searching for "passwords" in Spotlight should also take you to your passwords
This will then show up in the launchpad. https://i.imgur.com/IRPOMC5.png
Searching for 'pass' in Spotlight does bring up Keychain access - as that's in the apps list of Keywords... however the list of apps is way down on the scrolling https://i.imgur.com/KFUC0G0.png - it found 'password' as a string in 100 python files that I had to scroll through first.