Google Analytics exists so marketers can measure the impact their AdWords and AdSense spend is making and turn around and get a bigger budget. It doesn't reall

Google Analytics exists so marketers can measure the impact their AdWords and AdSense spend is making and turn around and get a bigger budget. It doesn't really try to be a business analytics tool - nor a real time analytics tool. So the answer to your question is "Because that's not their business." (Some of the more tin-foil hat wearing PPC guys out there say it's an incredibly bad idea to share your conversion rates to people that sell ads to both you and your competitors in an auction. This is probably not wrong.)