Obviously you should do what you want about hitchhikers, it’s your tank. That being said I have only used real liverock from the ocean over the past 20 years in the hobby. I have only ever had one truly bad hitchhiker, 2 fireworms. I’ve used liverock from Fiji, Tonga, Australia, tbs saltwater, and KP aquatics. The fireworms came in on KP but were very easily removed. Hitchhiker issues are totally overblown in the hobby IMHO.