Bringing up the point we could go undefeated if there wasn't a comeback code/or the cpu getting a boost imo is absurd. The reason games such as Baseball Stars and Double Dribble were "easier" is because of the limited technology.
Nowadays we have advanced technology that allow developers to make games more realistic looking and playing, and allow them to increase the artificial intelligence in the game that in turn make the games more difficult to play and/or win.
It has nothing to do with the fact that in this day and age, if there wasn't some sort of "boost/cheat" given the the cpu that the human would win every single game they play.

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