Socialism promises predictability - or what else is there...
Socialism poorly adapts to change.
Well, life is unpredictable. Socialism promises predictability - or what else is there to imagine under this "right to live"? But there is nobody who can tell what tomorrow will bring, nobody and nothing that can guarantee well being. The basic premise of socialism is therefore as realizable as perpetuum mobile. Sometimes, the crops may be bad, natural disasters can strike, new technologies can emerge so your knowledge or skill is no longer valuable. Capitalists usually quietly and peacefully (though, of course, not necessarily lightheartedly and easily) accept these changes or losses as a thing that life brings, and learns how to adapt to the new circumstances. Socialists, on the other hand, usually begin a fruitless and absurd search of whom to blame for (not predicting) these abrupt changes, with the "outcome" of this "search" usually being "the capitalist behaviour" of some individual or a group of people, against whom the aggressive anger of the "common people" is subsequently senselessly turned.