I work on the ems side of things. A normal sized dose of ketamine is a lot less harmful than many other options. I’ve experienced seeing levels of histaria or rage in people that I wouldn’t have believed existed 20 years ago. It’s taken six of us to hold down a 110 pound woman that’s trying to claw and bite and flail. They’ll dislocate a shoulder just trying to struggle out of straps. Yes, less of us could have overpowered her, but not without physically hurting her to do it.
Bottom line is, ketamine is needed, because overall, it helps a lot more people than it hurts. I’ve never been around it being used when it wasn’t necessary or being over dosed.