Additionally, I was not personally aware of any way to "sync directly" other than using the Google Drive desktop client (https://www.google.com/drive/download/) and storing the database file in the synced folder. It sounds like you're saying Keepass has some direct integration with Google Drive?
All of that said, I am really not invested in this issue - I use multiple cloud sync services and it doesn't bother me.
Indeed it has a plugin for this, yeah. That's exactly what I'm saying. https://sourceforge.net/projects/kp-googlesync/
I created a keepass/syncthing directory somewhere inside my home directory, and I told Syncthing to sync only that directory. And the directory only contains the Keepass database plus a few Syncthing log files and such.
Sorry, I hope it's clear now.
> You're not really going to get around having to install "something" to sync your passwords if you want to have your passwords synced
Huh? This is obviously wrong; I'm doing literally this with KeePass. I haven't installed anything, and it has a plugin to sync directly with Google Drive that doesn't mess with or care about anything in the rest of the system.