My understanding of the problem under discussion here is that there are some people who will refuse to use a cloud syncing service, period. Syncing with Google Drive does not get around this constraint, regardless of whether it requires any locally installed software.

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.