I don't get the point, TOR is meant to conceal your identity, using TOR on Facebook projects a terrible understanding of how it works
E.g. you don't want your ISP to know you're visiting Facebook.
After all, TOR gives you flexibility in privacy, it's up to you how to use it.
Exactly. Some countries or even employers etc don't allow access, but I don't see why you need a tor address anyway when you can just visit the normal url via it.