Does anyone else find it odd that most JavaScript frameworks end up solving half the easy problems of doing frontend heavy web development, and leave the other

Does anyone else find it odd that most JavaScript frameworks end up solving half the easy problems of doing frontend heavy web development, and leave the other half unsolved? Backbone goes so far as to encourage a menagerie of bizarrely constructed HTML strings getting injected into templates, Spine has superfat controllers instead utilizing models more prominently, and AngularJS solves the (relatively easy) problem of databinding and little else. What the hell? This is why we have to use roll our own solution at my company using jQuery + BackBone + _.template. We end up having most of the state either bound into the DOM (ala Angular, but done ourselves), or stored in a Cache object backed by Backbone.