JohnathanStrange said:
Actually, the question wasn't whether they ride lousy horses but why they ride them. There's little doubt that their horses aren't the best, which seems at odds with their designation as knights and hunters. Why is that? that's what I was trying to address.
Nevertheless, your post didn't answer that question satisfactorily, either, since as marly pointed out, they ride crappy horses regardless of whether they're ex-prisoners or not. Logically, they'd have access to any horses they wanted, since they obviously aren't short on money (And even if they were, they could just pillage a ranch or something).
Rando, they need better horses because...
It makes no sense that the most skilled and best-equipped warriors in the game have the second worse horses in the game.
Saddle horses are easy to kill.
Saddle horses are slow.
Saddle horses turn slower than an oil tanker.
Saddle horses have a very weak charge, and instantly rear after charging a group of infantry. The knights then get swarmed, unhorsed and raped. As a result of this, the dark hunter parties are ridiculously easy to defeat. In fact, it makes no sense to kill their horses unless you can kill the riders immediately afterwards (Or with the same blow), since I'd say they're much more dangerous on foot.
Simply put, it's just plain silly. I'd say you should keep the occasional warhorse, but replace all the saddle horses with chargers. That'd make them the fearsome opponents they deserve to be.