Ok, but the leadership class is usually in a foreign country. Historically, hostile foreign countries or ones where you can't trust the local government. So to

Ok, but the leadership class is usually in a foreign country. Historically, hostile foreign countries or ones where you can't trust the local government. So to get people in those countries, you need a militarized police force. We could have sent in police to arrest OBL in Pakistan, but they would have looked a lot like seal team 6 ( or maybe we could have had the Pakistanis do it, but that doesn't work in all cases. For example, the Taliban in 2001 would not have helped us) Also, the leadership may not care about their consequences too much either, other than preferably living to fight another day.