No, you would be cutting off hair and losing inches..Trust me, I did this..If your hair NATURALLY grows this way, it's very difficult to change..And if you have a specific hair goal in mind, then it wouldn't benefit you to do so..You could do so AFTER reaching the hair goal..Maybe that might work, if you really want that hair shape..
Another thing that helped me was moisturizing the shorter hairs that make the shape more of a V..This helped them grow longer and made the U shape..But my hair does not grow straight across either..