I don't believe that is accurate, but maybe I am missing something (I am not a Windows user).
Looking at 2 explanation of how to map a Dropbox as a drive…
http://lkeng.org/wp/?p=147
https://www.youtube.com/watch?v=5d8uvseVr5A
Both of those are linking to the 'local copy' of Dropbox. It is not a true 'network' drive as far as I can see (it still requires the local copy on the PC).
Another video suggests using another service to mount the Dropbox, but that is not using Dropbox anymore, it is going through Otixo…
https://www.youtube.com/watch?v=FAIpm2qmglU
Dropbox does not provide easy to use URL's to mount as a network disk so I don't think this is possible on OS X.
Dropbox's forum has this too…
https://www.dropboxforum.com/hc/communities/public/questions/202133795-How-to-ma p-dropbox-as-a-network-drive-on-Mac?loca…
You may need to examine the Windows computers carefully - if they have Dropbox installed & running then all the files are stored on the local machine in addition to the 'mapped drive'.
It looks to me like people are 'redirecting' the local copy to appear like a remote disk just so they can address that path on other machines - each PC is being setup the same. You could create aliases on OS X, but it doesn't help move files off the machine.
Hopefully someone else will contradict me, but I don't think this is how Dropbox works.