This style of argument has been previously made regarding things like torrenting during the heyday of piracy ("why would you need <x> except for illegal purposes!")
In my opinion, it's the exact same argument saying that selling a tool means taking responsibility for how that tool is used by its new owner. You can use a shovel to both create something new (plant a tree) or destroy something (rip up your neighbor's garden).
The problem isn't the tool, the problem is how the end user uses it. These models aren't living thinking entities that enduce or on their own infringe copyright / do other illegal activities.
They aren't encouraging people to misuse them and it is solely on the user's shoulders for their choice to use them in a way that would cause infringement if the result is used commercially.