"From what I know, nomads and villains are just two sides of the same coin. Villains do most of the real crime. Nomads do most of the mule work - the supplying and transportation." Aldrich said this, but he understood it was only a surface level conception of what the nomads were like.
As a city child, it was true that Aldrich knew almost nothing about nomads. And because nomads were away from society proper, there was very little information about them other than traditional media outlets that branded nomads as dangerous pillagers and criminals.
Nomads were branded even more dangerous than villains, because villains at least had a vested interest in maintaining societal order for profit.
Aldrich understood that the media had an interest in demonizing nomads, making their lifestyle away from cities less attractive, but he himself knew precious little about how nomads were or what they valued.