You cannot really "steal" military secrets by photograping them either, but it's still a threat to national safety. You cannot really "steal" trade secrets by photocopying documents, but it's still an incalculable damage to the company you target if you do. You cannot really "steal" someone's privacy, but if you look at their private correspondence or their electoral card you're still infringing on their right.
Does it really matter if you can call an action "stealing" or not? An action could still be damaging even if it's not technically "stealing".