Okay. I'm not dissing SBGi, the articles on that site totally blow me away.
If good, talented fighters who have a lot of heart want to hone their instinctual, natural, genetic urge to "tussle" because it's "fun" and a "more intense form of yoga," rather than learning to be protectors, I guess that's their decision! Hopefully one they've thought out.
Should they change their minds and decide that they want to use their hard-earned ability (to fight with skill under stress and against resistance) to protect themselves and others instead of just for fun yoga, at least they are training in a way that could be transferable to real-life situations if they do a bit of scenario training and learn what modifications to make.
"Of every hundred men, ten shouldn't even be there. Eighty are nothing but targets. Nine are the real fighters. We are lucky to have them, they make the battle. Ah, but the One! One of them is a Warrior...and he will bring the others back." -Hericletus