Strength and functional movement are paramount when it comes to long term health and injury prevention or rehabilitation.
The problem with the system today is not the movements themselves or the program people are doing.
The problem is the order that movement is prescribed in the life of the injury itself.
Most programs and practitioners put movement as the first thing to do when an injury or pathology is a problem.
The issue here is that if an area of your body is not functioning properly, movement to that area will only exacerbate the problem.
This is like driving your car around with the check engine light on.
Sure the car will keep driving even with the minor problem the light came on for.
But if that problem isn't addressed, it will create a bigger issue down the road.
The first step should be to restore function to the dysfunctional area first, then add the strength and functional movement piece.
This will ensure the optimal outcome for the client and will provide the best chance for long term success.