As I've said in another comment, I'm offering a free cyber security assessment tool online and 22% of people use a disposable address, meaning they remain anonymous yet they have me scan the internet for vulnerabilities. They're not protecting themselves from me, they're protecting themselves from the consequences of their actions.
You could have asked me what reasonable use cases exist.
There are extremely valid use cases for anonymity in B2C, most likely none in B2B.
Killing people on death row is legal in some states. One should still not be proud of making weapons.
I maintain my original statment: you should not be proud of what you did.
Downvote me all you like.