Since I use it quite a bit for secure notes, I've got it pinned in my toolbar. From the top down I've got Finder, System settings, Keychain Access, HomeKit, Launchpad, Safari... and then other things.
Make an alias to Keychain access. Name it "Passwords" and have that a directory that is indexed by Spotlight (the Utilities directory under Applications where Keychain Access is found works fine).
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.
Sorry, but that also doesn't mean anything to the average user. If anything it's made it more complicated for them—they will remember to type in "key" before they learn how to make an alias
That I don't have an issue with the word "keychain" doesn't mean it's not bad UX for the average Mac OS user