The goal of a landing page is to optimize to users' interests. Therefore, it shows advertising for the most suited (ctrppc) advertiser. It is quite an effective mechanism to direct traffic to the person most willing to pay for it. It's that brilliance and scale which I personally think is the end of the domaining industry (won't explain, will write a long article... soon).
So back to your argument of 'doing better': that is a VERY slippery slope. When you start to say one use is
more* legitimate than another you are essentially censoring free speech. If I own cars.com and just want to picture of my dog who is called Car, is that wrong? What if I only use the domain for email and redirect all the traffic because I don't want to do anything. The minute you say you can 'do better' you are taking your own beliefs and subjecting everyone else to them.