Knight at Arms
He didn't say his infantry were butchered by archers, he was comparing the killing speed of cav vs. archers (a few and very slowly) to infantry vs. infantry (high speed bloodbath).
I misunderstood him then.
Yes, infantry can kill faster because cavalry does not stay in melee. Which is as a good thing in my opinion. But then infantry also dies faster so I don't necessarily see that as a problem.