Do you need them? No. And there are iron sets by every brand that have lofts that suit anybody. Lots of things have changed in the last decade and one of the biggest was maneuvering weight around the head to alter ball flight along with better overall shaft technology. In doing so, a manufacturer can give you the ball flight, launch and other characteristics of a 7 iron in a 5 & 6 iron loft. More distance without changing ball flight means a lot of different things.