Whomever can punch, kick or move fastest can bypass the defense and have a great offensive attack. Resistance bands are great for martial arts training because they boost your strength, speed, and power precisely for martial arts movements.
The bands increase the force specifically by using the same angles, movements, and leverage as kicks, punches, and grappling. These exact lines of movement and force are very hard to replicate with other exercises. Also, you can adjust the tension and force more by simply moving your body forward or back without stopping to change the weight. It is the reason why resistance bands produce significantly higher increases in strength, speed, and enhanced neurological adaptation with sport specific movements and techniques.