For me, they are absolutely worth it. The 6 pack cost me $150 and if the image captured is more accurate or to my desired taste, then the less time and energy I have to put into post processing. I can spend more time flying and capturing images, saving time to really dial in the truly special moments. Computers and the software programs we all use are undeniably amazing as they can create things we never thought possible. However, filters I believe are still superior for the reasons above. For those that are either professionals or with a much great ability than myself, post processing may be a breeze and therefore no need for filters. Unfortunately, I need all the help I can get!
Hope that helps.