strength in itself does not matter when you cannot be in control of the movement of resistance and your joint. tools like medicine ball, stability ball, kettlebells and etc that add a little bit of stability challenge to your joints are a great tool to rewire your neurotransmitters and nervous system to be more focused during the exercise and have a deeper understanding of your muscles during the range of motion. these tools are especially advised for beginners, injury recovery phase, athletes, and bodybuilders who are used to training fast.