You do understand that when you use TOR, you're on that same network that OP calls the deep web, right? Then why would you say (not just you though, other ignorants itt as well) that it would not be safe to browse hidden sites on TOR?Now, let me state the obvious for everybody here: what is not safe is participating in illegal activities ANYWHERE. Wether it be on the usual web (lots of chances of getting caught) or on the TOR network (less chances of getting caught).
What TOR does is hide your identity, though it cannot do it perfectly, and give you access to it's hidden services on it's separate network. You can also browse any regular website. So OP, go see for yourself. You will probably not find a single interesting thing + miss your fast internet speeds. People that do find something interesting there usually know what they're looking for and where to look for it. Again, the only reason to go on TOR is anonymity and privacy. If you don't have a particular need for that, you won't find any good reason to use TOR.