Putt Out Two-Footers

As we have seen by the many misses on the pro golf tour, a two-foot putt is NOT a gimmie, even for pros. Even though it's "inside the leather," two feet is a distance that CAN BE MISSED. Why do people give themselves putts that they capable of missing two or three out of every ten tries? To some people, a two footer with some break is a difficult, knee knocking test of golf. I can see, for the sake of speedier golf, a policy of "gimmies" for putts INSIDE of one foot in non-tournament situations, but I think two feet and out is definitely too far to be given. Bottom line - ANYTHING that's far enough to miss should be putted out.