This is mostly weird because putting Denuvo on Tekken is like having the Green Berets restrict access to a cardboard box full of hair clippings. Would any appreciable number of people even bother pirating it in the first place? You can get the Tekken gameplay experience by playing Cookie Clicker.
Tekken has its own special place in gaming history due to being early in 3d adoption for fighting games. It was a trailblazer like DoA was for boob jiggle physics.