A landscape photo is the easiest thing for any camera to capture. Focus is at infinity and no depth of field means the lens can be literally a greasy pinhole and still get sharp shots. You're probably taking photos in direct sunlight so again the camera has to do very little work and is flooded with light.

Try taking a portrait photo in iffy lighting, like at a concert, wedding, sporting event, etc. Something that really needs a fast and sharp lens.