You are 100% correct that every exercise done incorrectly is unsafe, however starting with light farmers carry are are one of the safest exercises you can do in your fitness routine, even if you have never lifted weights before. I train people for a living and have done so for over 20 years. My speciality is youth athletes and geriatrics and I start with farmers carry pretty quickly in both populations. If anyone on this forum thinks light weight farmers carry is unsafe for them, most likely climbing trees and dragging out deer would be way more unsafe. Of course if you are currently injured, or have not been cleared from your doctor to start an exercise routine, do not add these to your program.