Oh, I don't disagree! But the key word in your response is "balancing." That implies there is some neutral party weighing the pros and cons of each new script, whereas in reality, what usually happens is you have the marketers on one side saying "all scripts are great" and the techies on the other side saying "all scripts are terrible," and the side that wins comes down more to which has more political power in the organization than to the actual business merits of the individual script. So lots of sites end up absurdly over-monetized and others absurdly under-monetized, with very few finding a sweet spot in the middle.