There are many uses for scaffolding in the building and other sectors. In most cases, scaffolding is hired rather than a company owning their own. That way they avoid the necessity of finding storage for when it is not in use, finding or owning transport to carry it to and from various worksites and employing staff to erect it. That said, if a company hires out scaffold but does not supply staff to erect it, who will you get to erect it on your worksite?
If you want to maintain safety on the building site, those who erect scaffolding should be fully trained to do so. If your own employees are going to be given that job, it is essential that they have access to and undergo the training necessary to become competent scaffolders. The risk of fatal injury is too high to allow an untrained person to simply read a manual and then go ahead and erect the scaffolding structure for your building or any other project.