In my mind, Drive isn't a file sharing / storage system, but rather a document sharing / storage system. If you want to store large numbers of files, you should use Cloud Storage, which can handle that. Drive is the cloud equivalent of LAN shared folders - you know those janky NFS and SMB shares that were always a giant headache because of permissions and other nonsense? That's what Drive is trying to be.
Seems like they could do it without the jankiness, though.