The intended use for this kind of product is that you hire a company to break into your company, and then tell you how they did it so that criminals (or, if you’re someone like a defence contractor, foreign spies) can’t do the same thing later. Sometimes they’re also used by journalists to prove that the government or a company isn’t taking necessary precautions or by hobbyists at events where everyone’s aware that everyone else will try to break into their stuff. There’s typically vetting of anyone buying non-hobbyist quantities of anything, and it’s all equipment within theoretical reach of organised crime or state actors, so pentesters need to have access, too, or they can’t reasonably assess the real-world threat that’s posed.