Deadlifts are so safe that... there are hundreds of deadlift safety tutorials on Youtube, where poor form and a bad instructor can cause irreversible damage very abruptly.
Notice how this doesn't apply to jumping jacks or the plank.
That you always have to couch the benefits of deadlifts in the "when done properly" disclaimer should be a hint as to what they're talking about. Hell, even lifting with one's legs instead of one's back comes so unnaturally to some that my refrigerator's box came with "lift with legs" instructions stamped onto it complete with a series of pictograms.
Notice how this doesn't apply to jumping jacks or the plank.
That you always have to couch the benefits of deadlifts in the "when done properly" disclaimer should be a hint as to what they're talking about. Hell, even lifting with one's legs instead of one's back comes so unnaturally to some that my refrigerator's box came with "lift with legs" instructions stamped onto it complete with a series of pictograms.