It might be a game, but real life forms the basis for it. How else will you explain why a kitchen knife does less damage in CRPG compared to say a scimitar? If we threw out every real life benchmark, can I have horses that fly and shoot fire from their nostrils? Or dresses with 60 armour?
In case you did not read the full post I do not advocate running down infantry. Infantry need to know that in times when they see a friendly horseman coming towards them, THEY need to move out of the way AS WELL. The horseman obviously does not want to bowl them over, and is probably trying their best to avoid them, but several factors can cause this to be difficult to achieve, such as getting chased and sandwiched by 2 enemy cav (turn too much and eat a lance), parthian shots, horse maneuvers like a brick etc. Plus there is the whole energy conservation thing that is important in cav duels. So help the horsemen out and step out of the way as well, and they will help you.
I hate any unfortunate accidents that happen, and avoid it as much as humanely possible (I play America's army, where I found it better to be shot by an unconfirmed target than to risk accidentally kill a teammate. I obviously get type scummed a lot for actually asking me team to report in..) but its no real skin off the horseman's teeth if he bowls you over, as the knocking over usually does not result in a direct tk, but often gets the pedestrian killed indirectly instead. So for the love of horses, please move away for your own sake. Don't stand staring at my horse with puppy eyes expecting me to do all the moving. I am dodging enemy lancers as well as friendly unaware crunchies already. This is what is meant horses have the right of way. Dispute this right of way at your own peril.
Up next, watch someone dispute right of way with a M1A1 or an armoured bulldozer. More at 10.