How is protecting yourself from harm remotely comparable to protecting civilians and public welfare from harm?
They'd go looking for Sivana before he could build his assault mechanoid or whatever, they'd go looking for the smuggling ring etc.
That's not proactive, by your definition. If the smuggling ring exists, how is that not an active crime ring? Sivana is a wanted criminal, who has already committed umpteen bazillion offenses; him being free and out in the world is already a crime in progress, and if he's got the blueprints for an assault mechanoid out on the table, he's actively beginning the commission of another.