Your weight whinge doesn't add up. One of the only issues with 1x11 is top speed. I think this is more about be able to run a bigger ring up front, rather than an easier climbing gear. There are a load of advantages to using 1x11 (or 1x10) over 2x whatever. I use a guide up front too, as no system is 100% reliable. At the end of the day, you don't have to buy it. No one does.