Plus, leveling the target area with dumb shells is not necessarily working, exhibit A the Western Front in WW1. And if said target area is a city, the leveling

Plus, leveling the target area with dumb shells is not necessarily working, exhibit A the Western Front in WW1. And if said target area is a city, the leveling is kind of frowned upon nowadays (depending of course on who is levelling and who is being levelled). The alternative is guided artillery shells. And those are damn expensive.