The reason MS puts all the main folders in onedrive is because users are tech illiterate. Most dont understand they need to place files into a special directory to be swished away to the cloud service. I know, because I've done the same thing when i setup my parents pc with linux... no matter how many times i explain "just place the files in this folder to automatically synced" all their files just up in the standard home directories never to be synced. I ended up just symbolic linking the home directory to one in the cloud directory. >_>

Now how MS managed to even fucked that up.... well thats a whole other story.