1) No Stretch Component
That’s why the Romanian deadlift works so well at building the posterior chain. With the deadlift, most of the work is done in an isometric manner with no real eccentric loading.
2) Low Time Under Tension
Given how many muscles are involved in the traditional deadlift, the time under tension is spread so far across the body that no specific muscle receives a lot of direct work.
If bodybuilding is all about providing progressive tension to specific muscles through a full range of motion, surely we could be doing something better instead of deadlifting?
3) The Back Works Isometrically Only
And if you did want to add deadlifts into a back routine, put them at the end – so you can push the fatigued back muscles further after the productive full range of motion work preceding it.
4) It Ruins Your Workouts
5) Weekly Recovery
6) Injury Risk
The risk/reward trade off of the deadlift isn’t worth it. Not many have the requisite flexibility or leverages to pull safely off the floor. And if this is you, a rack deadlift is a safer and more productive exercise.