So you didn't mean 50/50s you meant stealing the ball by pinching it. Make your mind up what you are arguing about. A hack down is not a 50/50, its a foul and nothing to be proud of. Kev and David were fouled more often than go in for 50/50s because of their ability to steal the ball and then were hacked down because they were too clever.
The best defenders you will ever see will hardly ever make a tackle, they don't have to because of positional awareness and reading of the game means they intercept. Colin Hendry was loved by City fans because he would fly into tackles, that just meant he was a poor defender because he was out of position and had too. Look at someone like Alan Hansen, he was magnificent, hardly ever made a tackle, because he read the game so well. Midfielders are the same, the best don't have to tackle, its why players like Grealish, Gow and the likes of Vinnie Jones are not around anymore because football is different, players read the game better, they are more tactically aware and the technical ability means 50/50s are rare. If you love 50/50s go watch a game in the park between the Dog and Duck and the Little stow on the Wold river dredgers third eleven.