Indispensable for a WOD, Weightlifting or Powerlifting
Indispensable because having more support you will improve your PRs, but also because they allow you to change the pressure they make with just a gesture.
So you can make a very heavy Clean & Jerk and walk to the wall release the pressure to make 20 HSPU without problems.
And when you finish the HSPU, you increase the pressure again and you do a heavy clean that stands up the people.