It doesn't
inherently change the way one plays, it's just that many people can't help themselves and allow their meta knowledge to affect their play style. I played through more than 10 season in CFM in Madden 15 and I never let any goals influence how I played in any game. I played my style, adjusted to whatever game situation occurred and let the XP chips fall where they may. The players who progressed the best/got the most XP did so because my style and play calling allowed them to make the most plays.
Not liking this system is a completely reasonable stance to have, but it really is a User choice to allow it to influence your play style in any way.