I think it takes a lot of effort to bring Fuerte to competitive play, and I DO believe that tetsu and TKD managed to do that, even if they are not ranked in the top 50. A proof of that is the Gods Garden tournament that happened a couple of months ago, which gathers that absolute top players in Japan. Both Tetsu and TKD ranked 7th place in the top 8. Oh, and they beat out Nemo and Kindevu easily (who are ranked 5th and 9th on that list), so they certainly can do it. I remember that I have seen this list a long time ago, I wonder if there is an updated one, maybe one of the two managed to get in hopefully.
BUT, I think both Tetsu and TKD realize that Fuerte is simply more about fun and satisfaction, otherwise they would pick someone else if they only want to be ranked higher. I honestly have more fun with Fuerte than any other character in the game, which is what matters.