Someone already does. ZapTip etc. But how often have we heard about issues? Short Circuits and even fires and it ended up being a non Apple Third Party acessory that was faulty and caused the issues?

Is it really that much to ask if one wants to use only official apple tech? One dedicated magsafe and this would have been a non issue. It can't have made the macbook thicker seeing as how small the magsafe is. They could have even mentioned in the keynote "and if you don't want to use the magsafe, charge your macbook from any of the usb-c devices" And simply put both charging options in the store so people could get a non magsafe usb-c is they wanted.