Probably to ensure that Ryo doesn't pick up on any of his bad habits. He's just using himself as an example of what not to turn out like. The guy is obviously in poor health as he's hunched over most of the time as well.
Just as he says it: You may buy moves and items, but you cannot buy health. When your health is getting lost during a fight, you simply can´t "buy" new one... (But it´s refreshed after the fight)