And again wrong! They did not fight on horseback, they used horses as transport to get to the fight.
Which if you'd read the thread properly is what I advocated as a more realistic use of 'rough riders' in the first place. Horses in Afghanistan enable the Special Forces to move around more discreetly and blend in. Did they use them in Iraq? No, because they didn't have to and why use them unless you have to?
The Mujadeen used them because they didn't have anything else.