Either way, throwing weapons becomes a sub-par option when you have enough levels to acquire magically enhanced weapons. Throwing those is not usually smart, unless you use the "Returning" enhancement... which is a +1 that doesn't actually improve your weapon, it just lets you use it more than once.
In my opinion, the reason to take a sub-par option would be coolness factor (balanced against not pulling your weight in the party, if they chose better combat options), and "Returning" is anything but cool.