The following video by Ali Taylor Golf explains different ways to use a 7-wood and when it is appropriate to throw one in the golf bag.
Taylor describes the 7-wood as being a great club but he knows many golfers who don’t like adding it to their set of clubs because it’s known as an “old man’s club”.
He says those golfers need to get over it and swallow their pride. They should use it if it benefits them because it can be a great tool to help lower scores and perform better.
He shows in the video the trajectory of many golfers who hit their long irons. It is low and has less carry than golfers who use a 7-wood.
The long iron low trajectory isn’t ideal when trying to clear bunkers or ponds on the way to the hole. He shows how much better the ball flight and distance is with the 7-wood.