evey one(except you apperently) knows that a horse will charge into a stake.
and there is no AI for horses ffs, and the point of stakes was to hurt horses.
if what you say is true, and horses wont go to stakes or guys with spears, than why were stakes pointy? BECAUSE HORSES DID RUN INTO THEM FFS!!!
Ok - lets try some simple logic.
Lets say you are right and that a rider can make a horse run into a stake.
By the same token, a rider can make a horse run into a man, which are afterall soft and squishy.
Again by the same token, the rider can charge their horse into a group of men.
Why then, could Cavalry NOT make their horses run into a group of men aiming spears (or bayonets) at them? It can't be the men because both you and I agree that its perfectly reasonable for Cavalry to charge infantry. In fact before the introduction of the Pike it was the dominant Cavalry tactic on the Battlefield (cavalry riding knee to knee in a dense formation and mowing down everything in front of them). This is why Pikes were used! If it was the wall of men that stopped horses from charging, then the pike and subsequently the bayonet would never have been needed.
As for why stakes are pointy. Well that's to deter horses from walking past them. A horse won't charge blunt stakes either, but once close enough to realise they won't hurt, a horse will walk past them. A sharp stake on the other hand will continue to worry the horse and cause the rider considerably more problems when trying to get through a line of stakes.
Btw Tears, we're talking about charging into stakes rather than jumping over them. However, perhaps you are right though and deployable cRPG stakes should cause damage to horses even if its just to punish the idiocy of their riders.