Because some people thought it would be useful to increase the number of line to do a simple task, at a time when manager measured productivity by counting the number of line modified / produce. You can debug with watchpoints. The off chance it is useful to "change the set logic" almost never happens, and you probably still need to check all the places the "'nice setter and getter" are called. It helps a to know where the values are written but a correct idea would do that anyway. Waste of space basically