Actually, one can take good photos even with a simple camera. But if a shoot has certain requirements, such as difficult lighting, dynamics, then more expensive, photosensitive optics is required that allows taking photos in complicated conditions. Modern cameras have a lot of pros. For example, they work better in twilight and besides, are much lighter. It is hard to survive a 12-hour day with heavy cameras of older generations. If I have a chance to use state-of-the-art cameras, I do use them.