Once again I will be the one who will tell you what you don't want to hear...........
Absolutely not!!!!Everyone needs a mentor to watch over them. If you never had a teacher in school, how do you acquire knowledge. How does one teach themselves to read at an early age? It must be taught. There are so many arguments for this, but I will stick with just one. Who is to correct you? What if you practice wrong? I have heard people say they have studied for 20 years, but if they are practicing with bad habit, wrong information, they have practiced 20 years doing the wrong thing which makes it worthless. There is much in the Martial Arts that needs refining, and only a person who knows MORE than you can do this. Besides you learn from what you do wrong, not what you do right. How will you correct yourself? You won't, so how will you change? No matter what, one needs stimulus. If not for an instructor to show you various thoughts methods etc, you will have a single idea, yours. If you don't want to be corrected, and always do things right and your way, be your own teacher, but how do you define student from teacher? You can learn from books, tapes etc, but NOTHING takes the place of being on the mat with a senior, or an instructor, there is nothing that can replace the process of being lead on a journey.
I once met a student of Jeet Kune Do, He trained with me and more and more I saw his basics were terrible, and he had nothing behind his strikes. I asked where he learned and he said he learned from tapes and a book. I asked him to perform a variation of what he was doing and he said there wasn't one, the BOOK SAID, this was it. You can see the problem. No wonder he was so sloppy.
Just because I put BMW seats in my Volswagen doesn't mean I drive a BMW, and just because I put air plane seats in my house doesn't mean my house can fly. Just because you read, study and watch Martial Arts, doesn't mean you can do them!