Https not supported

I am currently trying to map all http pages to https pages. As the network providers are now investigating into giving advertisement based on your traffic. So I starting to encrypt all my traffic. While this is find quite a few pages that don't have https or map to http. The Google https start page for example just redirects to the http page. I don't really like this approach. Why don't the web page providers just enable https. I am aware that this will create a little bit more load on the servers but today there are many hardware encryption cards that will take away the load from the CPU. So I will still use Tor. When I get time I will start writing a crawler that checks a few websites if they enable https.