in a proper comp, you have spotters on either side of the bar too.
Their job is to help lift the bar.
the spotter behind is there to keep the lifter from falling or folding over etc.
Charlie - the safety bars can be removed.
you can do everything in there as the pin height where you put the bar has many heights.
Most of those cages will also have chin up handles on the top and some have dipping bars on the side.
That's why they are great for home gyms.
you get a power cage, a bench, barbell and weights and you can do 99% of what you need.