Because it’s too much trouble messing with lasagna noodles and making those careful layers. The quality of the chosen sauce is key. A friend of mine couldn't figure out how she could make the same recipe I did but mine was better until we realized that she was buying a cheap, minimally seasoned spaghetti sauce. Use more or less sauce according to how wet your family prefers lasagna. Lazy Lasagna is easy to halve or double, just adjust the cooking time for the smaller or larger pan.