So by that logic, if I were to hack your computer, copy the data, and put sell it to some group for them to use, would that be theft. You still have your data, you haven’t lost anything directly, and while the group I sold it to may use a saved credit card or password to harm you I didn’t, so would what I did be considered theft?
Similarly, if I just sold the information gained by it to advertisers, marketers, your friendly neighborhood stalker, etc… Would that have been theft? You weren’t harmed, the demonstrably valuable information was just taken without your consent and given to a third party that wanted it.