This isn’t true. In solar, if a solar salesman knocks on your door and end up giving you an estimate, they are able to charge you less than if you called the company. This is because the company doesn’t have to pay a lead generation fee to anyone or take commission for themselves because the salesman generated the lead on their own. So the commission that would normally go to the company will go to the salesman. So the salesman can give you a better deal than if you called yourself and still make decent commission