There is no movement in the weight room more natural to humans than squatting.
For some setting weight onto the back of the shoulders can cause anxiety, failing the lift before its even started.
For others, there could be some lower back or shoulder issues not allowing you to squat.
Belt squats are a little different, its going to be a different feel, but it will work. Not every gym has a belt squat machine, so like any good lifter we adapt with variations.
The belt squat provides us with a variation to increase leg and hip strength without loading or damaging your back.
The weight pulling at the hip can also provide traction for the spine.
I get a hip pinch form time to time, and when I do I switch from barbell squats to belt squats, which help clear up the issue.
The greatest benefit for the belt squat is it will allow you to load the lower body without loading the spine.
I will also use these as a primer before squats on some days, just to get everything tight before the barbell.