You can assume anything you want, but that doesn't make you any more correct. You have zero experience and you have no idea what goes on in the real world. Everything looks good and easy on Youtube......That depends on the business and how they do it. As you can see, not everyone agrees on one single method. I would assume everyone uses a headset in 2022. But we can also see that's not the case.
Nothing "depends on the business". There are rules and regulations that everyone should be following. The most important basic rule is the guy in the tree calls the shots, the ground guys watch him and follow his directions. If they don't, they won't last long.....