If you’re an actor doing a rock climbing scene in a movie, you don’t know how the gear should be set up. You rely on the crew and rock climbing expert on set to check your gear. If you check or modify the gear to test it in some way, you may inadvertently make it unsafe because you don’t know anything about Rock climbing gear and safety.
Yes, if you’re a rock climber.
If you’re an actor doing a rock climbing scene in a movie, you don’t know how the gear should be set up. You rely on the crew and rock climbing expert on set to check your gear. If you check or modify the gear to test it in some way, you may inadvertently make it unsafe because you don’t know anything about Rock climbing gear and safety.
If you are climbing rocks in a movie, you are a rock climber.
If you are belaying someone fir a shot who falls and dies because their gear was not checked, then you are responsible in the exact same way.
If you have insufficient training to check it under the direct supervision of an expert without fucking it up, then you shouldn’t be anywhere near it.