Ads are also the thing that enables really amazing things to exist. Regardless of your feelings about facebook, the community it has created has had drastic impacts on the world at large. Almost the entire knowledge of humanity is now in anyone's grasp with a simple click of a button (Google). That was only possible because Google was able to make money off of it through ads. How do you propose that the internet pay for its self without ads? The whole freedom of the internet is because they can make money off of ads.
Not everyone needs to cure cancer to do something great.
Not everyone needs to cure cancer to do something great.