Normally, such a response would have been effective.
A cavalry charge was certainly devastating to infantry, but when the Orcs' morale was not shaken by the charge, numbers were no longer an issue. Nearly every Orc rushed toward them like mad, shouting slogans for their clans and the Horde.
Against another opponent—human cavalry, Night Elf Nightsaber riders, or the Draenei's original thunder-elephant cavalry—the Orcs' plan would have almost succeeded.
However, their opponents were not any of those.
Their opponents were Draenei transformed by Ye Ting and equipped with machinery rather than mere steel.
How could flesh and blood compete with machines in strength?!
No matter how relentlessly the Orcs charged forward, no matter how fearlessly they threw themselves before the cavalry in an attempt to slow them down, the Immortals continued onward with steady steps. Their sharp iron hooves trampled every enemy daring to stand in their path beneath their feet.
The Draenei vindicators were no less formidable, wielding their weapons and slaughtering every enemy who dared block their way.
The Orcs' first line of defense was quickly breached. Led personally by Yrel, the Draenei cavalry charged straight toward the fel cannons.
On the Horde's side, the Orcs did not feel fear because their first defensive line had been broken. More Orcs charged forward, waving great blades and battle axes as though they could not wait to "throw their lives away."
At least, that was how it looked to Yrel.
"Do they not know how to learn from their mistakes at all?"
That was Yrel's greatest confusion about the Orcs.
After fighting the Orcs for so long, Yrel could now be considered an expert at dealing with them.
Yet due to the differences in race and culture, Yrel, along with most Draenei, still could not fundamentally understand the Orcs.
It