I hate The Young Turks so much.

[Reforged]

and then the video ends without so much as a bit of speculation what the consequences for those countries would be if they were left with an untrained military. Thoughtless shite like that.

Apparently, the consequences are roughly similar whether we train a foreign military or not, been watching the news?  We may as well have spent that money elsewhere, for all the good that it did both us, and those foreign countries.  Were it not for the remarkable ineffectiveness of that strategy I doubt that there'd be any news to report on it at all.

Throwing money and mercs at a problem rarely solves the problem..unless the problem is how to best separate people from their money and employ said mercs.   Precisely the problem our strategy was designed to solve, btw, lol.

You're talking about military expenditure in training another nations army as if it were the same thing as military expenditure on aggressive maneuvers. 
Whether the reason for the initial force was justified or not; it happened. Leaving them with an untrained military to deal with the resulting discord would be a death sentence and likely give rise to further conflicts. Whether the attempt worked or not; doing nothing was not an option.