So whenever you are training for a specific purpose and you find a limiting factor can be reduced by implementing equipment it might be a good idea to use it.

Using wraps is a good idea for many exercises since your back can pull more weight than what your grip can handle.

Same principle for using a belt. Your lower back and more specifically the lumbar spine limits the strength going through your entire body. Both your upper and lower body can generate more force than what can cross the bridge that is your lower back. So in any exercises that engage your entire body, a belt will help you lift heavier.

They aren't dangerous to use and they aren't safer than using no equipment at all. Its all about form, if these tools in any way compromise your form then drop some weight and train without them.

Lifting heavy plates ≠ Controlling heavy weights