I could copy A New Hope once for every atom in the universe, and no money is lost and the original continues to exist.
Theft is moving stuff. You can't move software or digital assets, you can only copy them.
If I committed a burglary and instead of taking your TV I go to Walmart and buy a copy, then that's not burglary. You certainly wouldn't report me to the police.
I'm not concerned about my files being leaked because that's stealing. I'm concerned because they hold sensitive information that can be used for actual stealing, like for example with money.
Malware isn't bad because it's stealing. That's stupid. I know you know it's stupid, so I don't know why you said it.