I understand your argument, and perhaps a similar one will be made to the courts.

For some people, if a tool has a single legitimate user, and otherwise haa illegitimate users, then the tool should be allowed.

For others, if the tool is mostly used for illegitimate means, then the tool should be banned.

Where the law lands in this case will be partly based on these values, and the benefits/harms to all parties.

I don't know enough about the case, but I don't think it's as clear cut as a hammer.