you can't use martial arts in the street?

Can martial arts be used in the real world today?
A lot have changed since the traditional martial arts have been created. A lot of people say that they can't be used in today’s day and age. There is a lot of evidence to back this up, i mean just look at the techniques that these martial arts used, also look at the teaching of these arts. In the world where they were created, technology, politics, business and others have changed that world and it seems the martial arts are falling behind on the times.
What is a technique, in martial art it is the use of your body in a certain way to conflict damage on another. When some of these arts were created it was efficient and practical almost necessity for one to have to use its own limbs for defense. Then while the technology grew so did the advancement of weapons. Then it wasn’t needed anymore to use just your own limbs. A person could use a blade, or they could use a projectile. As the world kept changing skill was soon not needed to kill another person and the thought on how to defend ones self and kill others became much to easy.
As the technology that changed the method so did the idea around the world changed. With the help of technology people were becoming closer and closer together information was spreading and the world was getting smaller. Though these thoughts effected the world and how it was run, it did not effect the martial arts. Tradition dictated on how the arts were taught and the purpose and the way the techniques should be used. If one would look at martial arts developed later in the 20th century like Karate, Taekwondo, and Judo, one can see how these arts though effective in terms of small practical use were still not able to compete with the rest of the world ideas, because of the tradition bonded to them by there creators.
Can traditional martial arts be used today. My answer is no. At least not the way they were taught and used in the past. The morals and traditions can still be used and should be used for a person with out morals, discipline and a respect for life should not know anything about destroying it. So in the ever changing world the martial arts have to change and they will through the changing thought on the techniques and how to use them.