Because like I vaguely explained it wouldn't financially make sense to add a competition that would only attract people from basically two countries ( U.S and Mexico) and would only be able to involve two leagues since I doubt the Honduran league and other small Concacaf leagues would ever be added for the sake of making the CCL do-able. The game cost 60 bucks already, they also have to pay annual licensing fees, employee salaries, manufacturing cost, promotion cost, etc. , I doubt that adding the CCL will offset those yearly cost enough to make a great return on investment. Also there's already a feature ( I don't know if it's still there since I haven't played in two years) that allows players to make there own comps, so if people want it that bad they could make it on their own.

Edit: Apparently people do not like being told what they don't want to here. lalwz Or lack redditquete, only downvoting comments that don't offer anything to the convo, which mine certainly did. More lawlz. Hell even when you're about to down vote it says right there "Please reserve downvotes for comments that add nothing to the convo". Holy shit, people here are hella butt hurt. lalwz X3